The 20-pin connector originally used by Stern was notorious for poor connections, with burnt pins and plastic housing. In this case, soldering the wires direct to the circuit board would prevent the machine being dismantled - the wiring goes up into the back box
You got a Cheetah?No, 20 way, exactly as used on the display modules. It was okay there, but with the higher current connections to/from the rectifier board it wasn't up to the job. Usually the general illumination connections (Green, White, Orange and Red) went first, as with my 'Seawitch' and 'Cheetah'