Flexible Wire Adpater, 7-Way Blade (Tow Vehicle) To 4-Way Flat (Trailer). Hopkins Brand.

Endurance 7 RV Blade to 4 Wire Flat LED Flex Adapter
Description:

Includes Function Testing L.E.D. Test Lights, Verifies Electrical Continuity

Flexible Wire Provides Larger Turning Radius & Flexible Reach

Easy-Pull Grip design

Includes Dust Cover & Grease Packet to Protect Terminals

Hoppy Endurance Part # 47340:
Trailer Plug Adapters, LED Adapters / Nite-Glow™, Endurance 7 RV Blade to 4 Flat LED Flex Adapter