Wiring DIY extensions: Just to be perfectly clear. The power cable from Godox / CheetahLight power pack to flash head contains three cores. The DIN plug supplied on cables has five 'live' pins - but these only feed into those 3 cores. So effectively, two of the pins are redundant in this specific application.
When you cut the Godox-fitted DIN plug off a cable, pins 6, 7 and the ring shield all show continuity on the red core only. Logic dictates, therefore, that pins 6, 7 and the ring shield are bridged inside the Godox-fitted DIN plug. Before I started making my mods, I tested every which way and found positively no advantage whatsoever in fiddling round continuing this 5 down to 3, 3 back up to 5, 5 down to 3 connection sequence. Extra work soldering, extra work making those little bridge pieces, no advantage at all that I could discover. I have only tested this on the Godox pack and the various leads supplied - it may well be that other makes do require those extra pins but I'm not prepared to cut up a US$89 cable just out of curiosity!
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Someone with, for example, a Quantum QT49 may like to check continuity on their pin configuration. For the Godox packs, though, I could find no reason other than filling the gaps to bother with those extra connections. As you can see, pin 6 isn't connected and neither is the ring shield tab - but it works even using Edward's 2-to-1 doubler
into an AD/CL360, putting the maximum power through all the connections.