There's so much knowledge on this site I never thought I would have anything to contribute that hasn't been done. I came up with a pretty easy way to install window trim. Hopefully this is helpful to the group.
I started taking pics with the second piece but they both go on the same way.
You will need four quick grips and some electrical tape.
Line the trim up in the seal all of the way around so you will be where you need to when you get to the corner. Then start at the leading edge.

I use quick grips to compress the trim into the groove in the seal.

Then I start working my way around using the grips.

As you work your way around. Use the electrical tape to keep the seal from sliding off of the glass or rolling to the back side. Be sure to keep tension on the top side before removing the clamps.