BA15s bulb holder. (Single pin with ground connection)
12v car led bulb socket 1156| Alibaba.com
2Pcs 1156 Bulb Socket BA15S Lamp Holder P21W Adapter Base Connector WDA CHQ G wi | eBay
Amazon.com: Bstenky BA15s 1156 LED Light Bulb Socket,2pcs Car Lamp Holder for Single Contact Snap-in Socket Assembly for Car and Truck Tail Light : Automotive
Amazon.com: The Lord of the Tools 4PCS 1156 LED Bulb Socket BA15S Lamp Holder Adapter Light Base Harness Plugs Connector Pre-Wired Wiring Sockets for Car Truck Trailer Dashboard Lights : Automotive
10PCS S25 1156 BA15S P21W 1157 BAY15D Car Auto LED Bulb Socket adapter Holder