Need 1962 Dodge Lancer Push Button Repair Help

I can't seem to find a diagram or any information on the 1962 Dodge Lancer dash panel push buttons. I hope i came to the right section of this forum.

About 3 months ago I was going to back out of my parking spot at Fred Meyer's and the reverse button just fell right back into the panel...haven't been able to use it since.

About a week ago, neutral fell through as well. A bit panicked (my son and I were out and about getting a shaved ice), I tried other gears...I never use 1st or 2nd, but, they wouldn't budge when I tried them. Fortunately I was able to get in drive.

I have neutral bypassed, so to get her to roll back so I can push her out of my driveway when I am taking my kid to school, I just take her out of park and I'm neutral to roll. Then I put her in drive and pray it doesn't fall off. The buttons are there, they are just dropped back in the instrument panel.

Now, I know I need an allen wrench to get past the wiper knob to remove the panel itself to get access to the buttons, etc. but that's it. I have no idea what I will be looking at in there, no diagrams or info, period. I am also having button issues with the heater buttons, lost defrost the other morning, so whatever is going on has to do with something being wonky in the panel itself. I have never had transmission problems, and was told when I bought her at Wildcat that she has had a trans rebuild (was a selling point for me).

Any quick response is appreciated, my neighbor is coming to look at it with me this morning around 9 or so. He's a Ford guy (rebuilds them) so I am not sure how much we'll accomplish with no instructions or diagrams.
Thanks!