Correct answer is worth an extra $1 towards your PPOT Xmas gift this year.
This is from my '68 wiring harness. No idea what it is or where it mounts. Only ID marks are "30/51" stamped into the base. Five tabs total, looks like all of them were used due to marks on each. Can't believe I'm actually putting the harness back together and planning on putting it back into the car this month! Crazy talk.
