Reese Connector 7 Way Plastic Trailer End in the Trailer Parts & Accessories department at Lowes.com
7 Pin Transducer To HOOK² Adapter | Accessory | Lowrance | Lowrance USA
Amazon.com: USB C to Dual HDMI Adapter,7 in 1 USB C Docking Station to Dual HDMI Displayport VGA Adapter,USB C to 3USB 2.0, Multi Monitor Adapter for Dell XPS 13 15,Lenovo Yoga,Huawei
1.375x24 to 1-7/16x20 Adapter | SD Tactical Arms
Amazon.com: MICTUNING 4-Way Flat to 7-Way Round Blade Trailer Adapter Wiring Plug Connector with Mounting Bracket : Automotive