I finally just Had to see what was under my headliners.
I don't know about the 13 but, I understand the L and R part.
The other numbers don't ring a bell for me, (maybe someone here has a clue)?
Passenger door inverted.
I do want too send a big, HEY! out to Bert though.
(Now I have to rebond some of the fir trees back to the fiberglass).