Oil Light-Loose Wire...???

While setting the timing on my 273, it seems I knocked the wire loose that controls my oil light in the dash.

I just found the wire (passenger side, running along the valve cover, toward the firewall) with a clip on the end, but for the life of me I couldn't figure out where it came from, or went to.
First I thought, somewhere off the firewall.
Then I realized, while starting the car, that the oil light didn't light up with the key in the accessory position-
"Ahhh...." I thought, "Must've come off the oil sensor thingy. That ought to be easy to find!"
So I popped the hood and looked around, and I think I found the sensor, only, it has no tab to attach the clip to (so either I snapped it off, or I'm missing something entirely!!)
:munky2:
I think that's the sensor, on the top of the block, near the distributor, on the passenger side-but I see no tab, (broken off or otherwise).

Where's this dang wire supposed to go?