I Have A 1993 Honda Civic Dx With No Tach. I Want To Install A 5' Tach From Auto Meter But The Instructions Tell Me Do Not Use If I Have A After Market Coil. I Do Have A 'msd' Blaster Coil '2' How Can I Install The Tach The Green Wire Go To The Negative Terminal Of The Coil Where Can I Put The Green Wire Coz I Cant Use The After Market Coil Any Tips Please.