Barcrest mpu4 Adders and ladders video quiz game

[webster007]

I am trying to setup a barcrest mpu4 video quiz game but I do not have the comms cable from the video mpu4 to the mpu4.

Does anyone have a photo of one and the way it connects to the mpu4?

 

[webster007]

It will be the same as the crystal maze game with the tracker ball.