Outer Limits 4x4 Board

Can anyone tell me how they wired an internal control switch for the Titan Solenoid pack?
Off the three spades, the center one is earth, and the other two are in and out, how is this wired?

Cheers
Corry

eath the centre pin then use a 2 way rocker with 12v in the middle and each side going to the in and out terminals (either side of the one you just earthed.) put an isolator on the 12v feed so people cant just hit the switch when pissed in your car!