I am in the middle of a street restoration and today was the day to reinstall the wire harness, but I need a fuse box connector block. The small round tab that locked the connectors into place has broken on one of my connector blocks.

Maybe someone has a fully parted car or a racer build where you deleted the fuse and relay panel (?)
Its connector "M" on the pink side that I need. Once you turn over the fuse block, its easy to figure out. The letter is stamped on the side of the main fuse block chassis. BTW, pull the lever on the side out to release all of the connectors...they will then all easily pull out (between the green and pink sides, first picture)

Thanks in advance for the help...PM me with any information.
Gene