revcounter wiring ????

[mulberry]

help needed im just putting in a revcounter from a spitty, in my SAMMIO can any one tell me which terminal is which on the back of the gauge, i have 1 male bullet....and 1 male spade......and a earth point. i know 1 wire is live wire in and another goes to the negative side on the coil,,but just unsure wich terminal is which

[mulberry]

ok i think ive worked it out,just incase any you guys get stuck, the bullet terminal goe`s to the negative side of the coil, and the spade terminal is the 12v supply into the revcounter....happy days