So that first pic with the rods going to the transmission? Yeah, that second rod is supposed to go to that area too! It looks like someone took the transmission out and put it back in on top of the shifting linkage. If that's right you need to find another transmission (sm318) and either swap the whole transmission out or the part where the linkage connects. Very weird that they just left it there smashed under whatever wood piece that is.
In my thread I show a lot of transmission pics. You can see how it's supposed to look starting about midway down this page here:
https://6066gmcclub.com/showthread.php?t=47321&page=15
Those transmissions come up for sale pretty often on craigslist etc. Just pick one up and you'll be set.