Almost everyone who works in audio has a collection of mystic artefacts that MUST be taken to every gig. Gaff, torch, panadol ... cables and adaptors that will connect anything to anything. The very special coloured ones that scream out from the tangle of cable spaghetti "don't leave me!"
Splitters, adaptors, polarity changers, sex changers, summing cables, mic cables, signal cables, speaker cables .. and all the rest.
This is where you get them