Tonneau cover install help

Just bought a factory Toyota tonneau cover and need help installing. I have been looking for replacement bed rail caps but don’t wanna pay $300 bucks for two pieces of plastic. So I am just going to cut the ones I have. Am I correct in doing that or do I buy precut bed rail covers? If not anyone have any advice for cutting the opening, don’t wanna mess it up. Have been looking for install videos but can’t find anything where they cut the bed rails. Looking for advice!

 

Cutting the rail covers is relatively easy. It's fairly pliable plastic.

 

How am I able to tell where to cut

 

You have to remove the rail covers first to install the latch pin brackets. Then just lay the rail cover over the latch pin brackets to mark the spots to cut. See: https://www.tacomaworld.com/threads/oem-tonneau-cover-install.444415/

 

If you're anywhere near southern NJ I can help you out