4 speed safety switch

The clutch safety switch works just like a neutral safety switch. A starter relay designed for auto/ or clutch safety has 4 terminals

The big stud goes to the battery and also serves as a junction point, and a second cable goes from there to the large stud on the starter solenoid

The exposed "square" screw terminal goes down to the small screw on your solenoid

One (does not matter which) push-on terminal goes to the usually yellow 'crank' signal coming out of the bulkhead harness from the ign switch

The remaining push-on goes down to neutral safety (auto) or in through a separate gromment through the firewall to the clutch safety switch.

Frankly, in my opinion, they are almost more of a danger than they are worth, example:

There once, long ago, far away, in a previous life, someone's car and the 4 speed shifter WAS SLIGHTLY OUT OF ADJUSTMENT The car was equipped with the !@#$@#$%@$%!@#$!@#$$%!@#$!@#$ reverse lockout, forcing you to put the car in reverse before locking the colum, HERE is what happened:

Person got in the car, locked, in reverse. Turned on key, pushed in clutch, started car, pulled shifter out of reverse, and let out the clutch. VEHICLE IMMEDIATELY MOVED TO THE REAR because the transmission was still partially in reverse gear.

Messed up a nice car before he got 'er stopped.

I don't like the reverse lock, and I don't like clutch switches.

Depending on the year model of your vehicle, you can download a FREE factory shop manual here:

http://www.forabodiesonly.com/mopar/showthread.php?t=132309&highlight=manual,+download