I bought some replacement terminals that have similar dimensions to the original ones. The screw holes also line up with the screw holes on the subwoofer cabinet. However, there's a problem. Notice the difference in width between the solder tabs on the new speaker terminals and the old ones?

The solder tabs on the new speaker terminals are too wide to fit through the holes in the terminal PCB. Now what? I considered modding the new ones. However, that was going to be tricky, and a bit complicated.

Inestead, I decided to cut the wires to the PCB, solder those wires to the new speaker terminals and bolt the new terminals to the amp. The PCB would no longer be needed. The guide therefore documents how to do that. In future, if someone knows of terminals that fit this enclosure AND has solder tabs that will those PCB holes, let us know!