Aux switch unknown

[J34alan]

recently purchased 2023 6.4 HD with 5k miles. Original owner left a pack of upfitter wiring under the back seat. I then pressed the aux buttons. Aux1 and 2 light up but cannot determine what is being powered if anything. Where is the best starting point to find out?

 

[mtnrider]

Open the hood and see if anything is connected to the aux output connectors. Being that the harness is still in the truck it sounds like he never used them.

 

[J34alan]

No connections found but I have a nice Mopar OEM wiring kit, never opened.