The Stovebolt Site Forums The Shop Area Paint and Body Shop Damaged seat riser - help needed

I'm cleaning up the seat riser in my '51 3600 prior to replacing floor panels. There is obvious damage to the holes in the left front corner. Could someone share a photo of what this corner is supposed to look like so I can repair mine?

Also, there is a square hole punched through the rear of the riser, about mid way across (the edges are torn and bent over). It looks to me like this was a poor attempt at securing a lap belt (no seat belts were present when I got the truck). Could someone confirm whether there are not supposed to be any holes in the back of the riser, or that there is supposed to be a hole here (and if so, what size and shape)?

The factory assembly manual doesn't offer any help.

Thanks!