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Monday 27 November 2017 at 07:15
Docent electronics has the J4 connectors, the kit includes a tool for pulling the connectors out of the old housings (the kit is only the wiring with the connectors crimped on, you reuse the old housings)...$26 + shipping:
http://www.docentelectronics.com/httpdocs/AmusementGames/Pinball/Gottlieb/sys...
Source: http://pinside.com/pinball/forum/topic/black-hole-startup-issues#post-4093741