EV charger : want to change from L1 to L2 for cars that allow for one phase charging only

just installed EV charger in three-fase configuration. when loading a vehicule that allows for one-fase loading only, the ev charger takes the load from L1. I would like that to be changed to L2.

Anyway to do that in software or is it only possible in hardware, by swapping L1 and L2 cables in the charger?