I removed the old E6k and am working on installing an E8. The wiring from the e6k had seperate grounds for the home and the trigger sensor. The E8 has one ground in the sheilded 4-wire crank angle input. Now my question is can both grounds, the one from the trigger and the one from the home, be wired common? In the E8 manual it says"When wiring the trigger or home sensors ensure that only the ground from the trigger or home cable is used." I am confused. Please help