BTF-LIGHTING 4 Core 4 pin Small Size IP68 Y Shape 1 Male-Divided-2 Female Spillter Connctor Black Plastics 20AWG 15mm Metal Metal Nut Support All BTF-LIGHTING 4 pin Connector - - Amazon.com
4-pin Peripheral Power Connector Pinout
STEMMA QT / Qwiic JST SH 4-pin Cable with Premium Female Sockets [150mm Long] : ID 4397 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
3-Pin vs 4-Pin PC/Case Fans Compared [Differences & Which you'll need]