Nice and simple those automative connectors, most good ones are crimp as you need to pull 8+ amps down the cable.
Remember automotive light connectors are rarely rated above 10 amps so be careful. These connectors are about $15 a set.
XA coupe was impressed with my 1990's lighting kit using a 170mm scope mounted Lightforce and a 12v 7000mAh battery belt.
I have used the 4 pin XLR connectors - a standard solid connector used in the film and TV industry since portable lights were used.
12V is normally a 4 pin
3 pin is for audio, 5 pin is nominally a 24-30 V pack.
XLR connectors are lockable, robust and water resistant able to withstand apprentices. I have short, long, and a car battery cables.
Remember the covered protective sockets are ALWAYS the live connector end.
NEVER have a power connector with MALE pins exposed on your battery pack -its a socket you always use on your battery so it can't be shorted.
A 12v gel cell, NI-Cads or Li-MH do explode if shorted. think of that when you have a battery pack around your neck or waist.