Well, I didn't get a chance to actually find the mystery part as installed and photograph it because there wasn't a 767 with the forward bag bin ceiling opened up(there usually is) and I was pretty busy all night(installing landing gear wiring harnesses.....fun!). But I did print out the relevant IPC figure as well as the item text page. I also pulled a page out of my 767 school training manual that shows where the part is located(sort of) on the airplane.
This last image isn't exactly accurate as to the location, the slat aft quadrant is actually much farther down, closer to the wing root than where it's depicted below.
