OK. On the right-hand side of the cross-slide, in front of the cross-feed nut mounting block you'll see two vertical holes, one large, one small. The small one is a jack screw which limits how tight the large screw can clamp that end of the gib. On the other end (left side) all you have is the table lock bolt/handle.They are standard socket-head cap screws except that the jackscrew has the threads ground off the end so they don't get smashed and make it hard to remove. This is what I have on my MVN, made in 1978. I suppose yours could be different but I don't think they changed that stuff much over the years.
Sorry I can't provide a picture because my Y-axis scale is mounted right below those holes and I don't have enough hands to do a mirror-shot.
edit: NOTE- The jackscrew is a setscrew, not a socket-head cap screw. Sorry.