Ive got a quaife sequential in my escort, and im looking into fitting a flatshift system to it.

Now, i have seen that my emerald ecu supports flat shift, and needs a switched earth input to activate it between gear changes.

question i have is, what options do i have for this switched input? iv'e seen load cells, but not sure if they send an earth, or a variable voltage like a TPS?

Any info would be great as im well confused.