What kind of connector is this?

It’s for a gooseneck 4 pin connector. Male End. Any ideas how I can hook it up to a power source? ! upload and share!

Never seen anything like it

XLR

https://www.thomann.de/gb/dap_audio_gooselight_4pin_xlr_straight.htm

Regards Xandre

This is all I find for 4 pin trailer connector.

Wiring.
https://www.etrailer.com/question-12744.html

Thanks so much! You all are great!

It looks like a military circular bayonet connector, e.g. MIL-C-38999, size 11-4 insert

MIL-C-3899 Catalog

Used in aerospace and industrial; used on trailers? not so much, hard to find and expensive unless you work in the industry and have bucket loads of excess parts.

looks like a military type plug
these can be non standard on purpose

wle