Hello all! I messed up my stock S14 speedometer and Im going to install an aftermarket speedometer. Im looking towards the Stack one which does not come with a sender since it "taps" into the OEM senders and you then calibrate it.

My question:

Which wires do I tap into on a Manual transmission? Are they behind the gauge cluster or will I have to splice the actual sensor itself? I searched but I have not found this answer.

Thank you anyone for your help!