67 Bench Seat Help Needed

[es67chevy]

Does anyone have any good pictures of what the seat adjustment mechanism is supposed to look like? I have a recovered factory bench seat that has a keeper on the driver's side with an open face. The previous owners had used the magical duct tape to hold the bar on that goes from driver's side to passenger side. The passenger side keeper has a closed end which easily retains the bar. I'll attach some pictures to hopefully illustrate what I am referring to. The first picture show the driver's side. You can see that the keeper is open on the end that retains the bar. The last two are the passenger side which is closed so the bar stays put. Any help would be appreciated.