There are 5 different AMPSEAL polarization options identified by plug body color and part number suffix: AMPSEAL plugs.We found a deal on the connectors, but the slots didn't line up with the tabs on the MS3, so I used a Dremel to cut new slots. I'll go back later and straighten this up - just wanted to make sure they'll work right now. The slots and tabs key each connector to a specific socket, so they can't be mixed up.
The most common is the -1 variant (which is out of stock at the above vendor) but it looks like you need the -2 variant, anyway (gray body).
For cimping the pins on just a few connectors the most economical/sensible option is to use a manual "W" or "pretzel" crimper; e.g. - Molex # 63811-1000. Or do it ghetto style and mash the crimping wings onto the wire with needlenose pliers then solder (all but guaranteeing the wire will break later on if subjected to vibration - as is the case on a motorized vehicle - so this is not recommended).