It depends on where the two wires are on the wiring loom.
All the Federal cars I have seen have the coil near the offside petrol tank, just above the chassis. There is usually a resister located there which reduces the voltage to the coil to 9v. It is boosted to 12v from the starter solenoid on starting.
It is held in a metal Omega shaped bracket, and bolted through the fibreglass inner wing with 2 nuts and bolts. .