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i recently bought a voltage stabilizer. as my grounding point is :

i hooked up a metal with 5 holes at the front of the chasis where the original chasis ground wirelocated)
then the metal screwes the ground wire to

battery negative
tranny
intake manifold
engine head
alternator

now my voltage stabilizer to + and -
where the negative is sandwich with the ground wire.

is this ok? any suggestion? and wheredoi ground my headlamp?

thanks