That is the correct way to install that replacement strip.
Use a bit of RTV between the strip and the frame to seal it.
Another trick is to put the head of the screw under the top layer of rubber so the screw head is on top of the metal strip inside. Using a small screwdriver, pull the upper layer of rubber over the screw head so it doesn't show. Do this before installing the strip.
Run the screws all the way in, then pull the rubber over the head of the screw. The rubber will stretch and pop over the screw head.
When you install the strip, you can stick the screwdriver through the top layer hole of rubber and tighten the screw.
I went to my local ACE hardware store and bought stainless Philips head screws for this as the blade type screws are harder to use in this application.
The reason for putting the screw heads under the top layer of rubber is 1) it looks cleaner with the screws covered and 2) the top layer of the seal is not distorted by the screw head which would have a tendency to pull up the inner and outer edge of the weather strip when tightened down.
When I installed the weather strip, I started by installing all of the screws in the strip and covering the heads with the outer layer of rubber. Then I installed the first bottom screw right after where the strip bends to go underneath the door jam.
Then with the vertical part of the strip hanging down, I squeeze a bead of black RTV down each side of the strip about 1/8" in from the edge and put a good blob of RTV around the bend where it goes under.
Now pull and stretch the strip up until the top screw aligns to the hole and grab a few turns, but don't screw it all the way down then get the rest of the screws started. Working from bottom to top run the screws the rest of the way down.
If some of the black RTV squeezes out to the front edge, you can use a paper towel to wipe the excess off. I take a small piece of paper towel and fold it several times to get a sharp corner, then use the corner to wipe up the excess RTV.
Let the RTV set for 24hrs before closing the door.
When you shut the door, in most cases the weather strip inside part of the strip will try to fold under the wing window vertical edge. Pry it out so it lies on the inside of the wing window then close the door.
After a day or two with the door shut, the strip should have a "set" to it and stay in that position. If it doesn't, then try heating the strip up with a heat gun then close the door again and let it try to take a set.
Be careful that you don't melt the rubber with too much heat.
Good luck with your project.
Just an FYI,
I have owned Alpines and Tigers since 1968.
My first alpine was a red series 2.
Got rid of it, and bought another series 2 which I still have.
Then I bought a Tiger which was stolen.
Bought another Tiger for $800 witch was a bit beaten up, (back then they were cheep!)
Got rid of it in '71 and bought another MK1A for $1200 which I still have.
Bought a series V back in the '80s to use for commuting. I still have it also.
Most recently I bought a series 3 GT witch I plan to restore after I finish my complete restoration on the MK1A
I have a series IV which is retired for parts and a rear clip of a series V
Yes, too many projects, not enough time.
After completing the MK1A, the series 3 is next, then the white series II then the V.
Glad that I am retired!, ....hope I make it to the series II !