These are the thin "square base" pins used in M52TU, M54, S54, M62TU, N62 DME's (among others)
 
Used for the plug that connects the chassis to the DME, these allow you to build your own swap harness or run additional wires from the chassis to the DME (for example for swapping an M54 ino an M52TU car, to run the additional 6 wires for the electronic pedal)
 
Crimp base supports 22-23 AWG wire