I had trouble figuring out how to link Smart Life connected devices to Victron relays without learning node red or fiddling with wires, so I thought I'd share my approach.
It does require a permanent internet connection and some common sense to make sure things do not go wrong when there is no internet ;)
1. Buy or make an IOT relay like this ($29) which has different sockets for 'normally open' and 'normally closed' and connect to a Victron relay
https://www.amazon.com/Iot-Relay-Enclosed-High-Power-Raspberry/dp/B00WV7GMA2
2. Stick two smart plugs in it that are compatible with Smart Life, one will be powered (turned on) if the relay is open, one will be turned off if the relay is open.
3. Use Smart Life 'Scene' feature to control other devices based on whether the 'ON' smart plug is turned on, or the 'OFF' smart plug is turned on.
