How do i wire this capri dash up

[waynes world]

Hi all, still trying to find out about the wiring for the capri rev counter i have. This is the pic of the back where the 3 connectors/nuts are, all i need to know is where to connect the wires on the car running a 2l pinto, i am only using the rev counter aswell with speedo so i am not using the loom or plug

Please can anyone help, i dont want to mess about as i dont want to damage it.

thanks

wolly