Motorola - Newbie needs help

Good Afternoon - I was cleaning out my Mom's attic and came across a Motorola 21T47M0. I've fired it up and it seems to work. The back cover has holes for VHF / UHF connections - but when I remove the back I have no idea where the wires went too. I'm guessing that something is missing. Is anyone up on that model - and are you willing to deal with a novice?

Thanks in advance for any help. I'm trying to feed old video to the set and use it as a display piece.

Thanks