Hello, I bought an original honda rev meter and don´t know which of the four cables from my remote control box belong to which contact on the rev meter. The cables are yellow/blue; grey; black and black/yellow on the rev meter it says signal; ground and battery. so the most important question is: which cable is the signal and do I have to take the plus minus from the box or can I take any other plus/minus from the battery?<br />Appreciate any help<br />Thanks Holger