You want an orange/green or a brown wire. Brown changes to gray at the fender to subframe connection. The O/G wire for the OEM heated grips behind the radiator or the one leading to the rear brake switch and the brown wire in the sheath running along the left side of the under seat tray are good points. If you would rather avoid cutting into the stock harness, Eastern beaver has plug in modules that provide trigger wires.
Suzuki VStrom Electrics
Suzuki VStrom Electrics
Suzuki VStrom Electrics
Suzuki VStrom Electrics
Suzuki VStrom Electrics
Suzuki VStrom Electrics