how do you wire these things i know power and other what about the signal wire sorry for the noob question just gotta know to install thins any input would be great.....

where is the signal wire suppose to go they gave me som info on that but it sayz tach terminal or somthing i didn't get so can anybody help me out..

 

never mind blue wire behind the tach wires...

 

or the blue wire that has a connector on the driver's side harness connector