This thing was created as an drop - in Maktita battery terminal replacement. It was desigend to work with the excellent battery… | Battery terminal, Makita, Battery
Amazon.com: Fit for MAKITA 18v Battery Power Mount Connector Adapter Dock Holder with 14 awg Wires : Tools & Home Improvement
BL1830 PCB BMS Charging Protection Board Connector Terminal For Makita 14.4V 18V Li ion Battery Adapter Converter BL1815 BL1430|Power Tool Accessories| - AliExpress