I've read a lot of tach install guides. I just have a problem with the lighting wire, the yellow one. Im really knew to electrical stuff, can someone post in detail how I would connect the yellow wire to the auxilary port in the fuse box under the dash? Also, the guy I bought the car from already had a tach installed but took it out when he sold it to me, so I just wanna make sure, does the tach wire have a rubber thing on the end of it? it was under the hood on the drivers side towards the windshield. It wasnt solid blue, it was blue and had like small silver rings spaced throughout. Anyway, thanks. O, and the red wire, I have it connected straight to the battery, is that right?