Mini-Fit Jr. terminal part numbers
System 3 uses Molex Mini-Fit Jr. 4.2 mm (.165 in) connectors. For 18-24 gauge wire: female sockets 39-00-0060 (beryllium copper) or 39-00-0039 (brass); male pins 39-00-0062 (beryllium copper) or 39-00-0041 (brass).
Systems
Related tips
Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)