Molex 2510 (PC fan connector): I feel like I'm going crazy trying to find these connectors on Digikey / Mouser (I can only find them on AliExpress). Seems like a super common
31402-2510 Molex | Mouser
3-Pin Male Fan Connector, Molex 2510 – Coolerguys
Molex 2510 3 Pin Housing Connector Wire To Board
Male 2 Pin Fan Extension Connector Molex 2510 with Pins Black - MODDIY
High Quality Black Molex 2510 3 Pin 3pin Fan Female Pwm Power Shell Connector Housing +terminal Crimp Pins - Pc Hardware Cables & Adapters - AliExpress