cargo lighting

[Mrdi]

2008 Sprinter

Do the 3 cargo lights in the cargo area run off the main or the
OEM Aux battery?
Can led fixture w/ an off on switch just be wired to the same wires.
In the 2008 Cargo w/ Aux batt. all 3 lights go on simultaneously.

[cedarsanctum]

2008 Sprinter

Do the 3 cargo lights in the cargo area run off the main or the
OEM Aux battery?
Can led fixture w/ an off on switch just be wired to the same wires.
In the 2008 Cargo w/ Aux batt. all 3 lights go on simultaneously.

The only thing wired to the aux. battery is the power socket under the hand brake lever. Nothing else.
Jef