The black plug on the harness might have a white key in it you will have to remove to get it on. But also that harness will not work.
Pandora's are not regular jamma. They are "extended" jamma.
The grounds are different and so are the joys and buttons by a bit.
Also on TMNT p3 and p4 come off the turtles PCB not the jamma harness.
So they will never work without rewireing.
Also many games require more buttons.
Basically Pandora's are for a street fighter layout.
2 joys. 6 buttons each.