[juddss]

I have a 1970 suburban and It came with various holes in the back tailgate. I know the top right says Chevrolet and have already replaced it. Anybody know what goes under it on the right lower side? Also what goes on the left side where the two holes are. I have done various google searches of suburbans and have had no luck. I have also been on LMC truck and year one with no luck. Any help would be greatly appreciated.