In the mean time.....let's have a look at the cab....
The top....needs some good cleaning at least...maybe new vinyl or paint....don't know what it is yet

In the red you see that the power switch is "missing". In reality the underside of the switch is still there but it is defective. (same switch as on my Ms.Pac).
On the second pic in the red oval you see how they "bridged" the power switch profesionally.....
You also see how they professionally hacked in a Jamma connector....