Andy Burns wrote:

What's a better name than "4 pin latched flat" for this type of
connector?
http://www.yourduino.com/sunshop/images/products/large_186_4pinbk2.jpg

I remembered the same type of plug was (one of the various types) used
for CD audio into sound cards, and that turned up the name MPC2 ...

Which in reality is a Molex 50-57-9404
SL Crimp Housing, Single Row, Version G, Positive Latch, 4 Circuits