Aux Relay on the MultiPlus

Hello,
I would like to use the Victron Node-RED integration to control the Aux Relay on the MultiPlus
However, I can’t find any way to control it directly.

The relays on the Cerbo GX are already in use for the heat pump, so now I need to control a fan whenever the MultiPlus runs under load for a longer period, in order to cool the room.

The MultiPlus relays are not available in NodeRed.

You need to use VE.config to and configure the relay assistants there.