Didn't make any changes. The magnetic contact notifies the shelly by the 'SW'. This is triggered by this option -> Set the “Input State” option in the “Application Settings” if i'm right.
I'm using a simple Shelly 1. No need for a Shelly Plus for this job.
How dit you wire the relay 7042V000? By using the relay you don't need a magnetic contact?
I planned to have the Shelly connected to 230V and therefore the Shelly 1 was not an option anymore even though i bought it with add-on ~18 months ago.
I have connected the relay to Digital on the AddOn and then Relais GND to AddOn GND (next to Digital) as mentioned above (that is the new Addon ofc together with the Shelly 1 Plus.
The relay is on as long as the motor moves or garage is open. When closed it is off, i.e. NO. As you can switch it on the device it does not really matter.
And yes, with the relay you do not need a magnetic contact anymore (which should be a NC).