The TE 929504-3 is an 8-position receptacle housing from the Junior Power Timer series, a modular wire-to-wire system built for engine compartments and industrial harnesses where vibration and temperature cycling are the norm. This is the female side — mates with a Junior Power Timer plug header that carries the male terminals. The black colour is the standard production colour for this variant; no colour-coding trick to track.
The latch on the plug locks into the receptacle ramp — you'll hear it seat when it's home.