I have seen these before, but for the life of me I cannot seem to recall what they are called or what they’re for.
Google search - especially image search, where I’m trying to bring up similar items - is now a total potato and seemingly capped at one screen of results in a secure and sanitized browser.
JFC, I guess that’s what the extra-chonky 5 pins are for? Even so, they seem to be a bit on the delicate side for 30 freaking amps.
At work I use similarish D-sub connectors @ 40A/pin, 3 pairs => 120A @ 12V.
db13w3 has an alternative configuration with coax instead of power pins, used to be used for computer monitors. Even has it’s own wiki entry.
https://en.wikipedia.org/wiki/DB13W3
Maybe that’s why it’s familiar?