Electric Tach.

[JMFarley50@aol.com]

Am finishing up installing a new wiring harness for my bugeye.  I have  an 
electronic tach., which does not have the hookups in the bugeye  harness.  I 
have the white wire loop that plugs into the back of the tach.  - with one end 
going to the coil and, I assume, the other end to the  key switch.   Where does 
the other spade connector on the back hook up  to?  Other than a good ground, 
are there other hookups I should be  aware of?
 
Thanks,  John F.