How to switch off WiFi WLAN Multiplus II

PS: if it is still scanning in the background on the physical air-interface I may found out with a spectrum-analyser

Here’s the other question, the wifi or interface being always on has got to be a current drain on the battery however slight. If you have your camper parked in a garage for several months, it’s gonna drain the battery I would think?
I ended up purchasing a 12 volt shut off switch for the converter and I am going to put a separate one for the solar line which back-feeds the charge controller. This will shut power to the charge controller from the battery also.