Review on 🔌 GOOACC G-RE6 6 Pack Automotive Relay Harness Set - 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Harnesses | 2-Year Warranty by Ken Pinell

For example, sockets can be connected together. I needed a way to switch a 30 amp load without a dedicated high power switch. I'm planning to build a trailer lighting test block and use a rotary switch to toggle between functions and it only requires trailer brake activation to handle up to 30 amps. The relay is connected between the rotary switch and the brake output, and the rotary switch turns on the light directly.