So I installed this on Sunday. E-clip is 1/4" and can be found at any hardware store.
For the wiring, I followed the directions in post #98 except that I simply stripped the blue and green wires, tucked them into the plug making sure to put them on the side under compressions when in it's normal position, and then zip tired the wire to the wire bundles at the BCM. No solder, no risk of breaking the wires, completely removable if necessary.