I am helping my friend install a tach in his 2001 cobra. He purchased it from speedhut. The directions which suck IMO indicate that it does not require a tach adaptor. There is one yellow wire which is the tach lead. However, I am not sure how to hook it up. I assume that I may have to splice into one of the COP but I do not know which wire to tap into. Dont want to start experimenting Ideas? Thanks!