Gebildet JD2912 Car Relay with Harness 24V 40A 4 Pin SPST Harness Sockets with Color-labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2) https://www.amazon.com/dp/B07P17N3M1/ref=cm_sw_r_cp_api_i_iSWjFb85AVN54

85 and 86 come from the cutoff, 30 direct from the battery, and 87 to the load.