Adapter: IC3 Battery / JST PH-UMX Device
https://www.ludingtonhobbies.com/shop/spmxca312-adapter-ic3-battery-jst-ph-umx-device-16946
https://www.ludingtonhobbies.com/web/image/product.template/16946/image_1920?unique=f4333a2
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Manufacturer's Part #: SPMXCA312