My 73 year young Dad is restoring a '73 Ford 4000 Diesel. Been working on it a couple years now, a complete, teardown and rebuild. A couple weeks ago he found a Sims Cab for his tractor off another salvage 4000 at local used equipment dealer. The entire back glass is missing. There are two round knobs inside the cab toolbox, that I assume hold the window in the open position at the bottom. I've looked at the Sims website, but a lot of the stuff on their parts list doesn't have a picture, so you have no idea what to get. Anyone have pictures you could share with me of what we need? Or, better yet, one that someone would sell some parts off of to help me with Dads? Thank you in advance.