Product Tip - Easy way to Install the Quarter Window Trim:

Cut a 3-4' long piece of 24-26 gauge speaker/electric wire etc. and insert the wire into the "groove" where the trim inserts into the rubber on the upper or lower side (one at a time). Leave some of the wire sticking out of each end of the "groove".

Align the trim to it's proper position and press it in as far as you can into the "groove".
Start at one end and apply firm pressure on the trim piece and pull the wire down, or up depending on which one you are doing first (up on the upper one and down on the lower one) and work your way in slowly in one direction (end to end) continuing to apply pressure along the way as you pull (up or down) on the wire.

After you do one of them , insert both of the metal corners on the inserted trim in their proper location, then insert the wire in the other "groove"and align the other trim while making sure you "tuck" the trim into the corners before beginning the above process.

What the wire is doing is actually "opening" the "groove" to allow the "teeth" of the trim piece to engage with the rubber seal.

After you do it a time or two only take about 10-20 mins per side.