1967 Other Pontiac Models starter wires

It varies between cars and options the car came with.

There will be the battery cable. That goes on the big stud on the solenoid.

There will probably be 1 or more wires with a large eyelet to go on the big stud also. These supply electricity to the car. And possibly the link between the alternator and the battery for recharging.

There will be a wire with a small eyelet that goes to the small lug with the letter S next to it. This wire is “hot” when the key is in the crank position and energizes the solenoid.

There may be a wire with a small eyelet that goes to the small lug with the letter I or E next to it. This wire supplies full battery voltage to the coil while the starter is cranking the engine over so the coil can give maximum spark.

I hope this helps