AirCard with bridge configuration?

In my summerhouse I use a M1 in wintertime to keep some gadgets accessable, such as checking inhouse temperature.

That M1 is also used to control my car charger as I sometimes stop by wintertime when I don´t have service in my fiber connection. The car charger is communicating with a loadblancing device, also through the M1.

Now I have a problem with that loadbalancer as it´s mounted in the metal housing for the electric meter. The wi-fi signal is too weak.

My question is if I can use anAirCard 785S (as I have) as a bridge?

Put the AirCard close to the loadbalancer, connection between them and let the AirCard communicate with the M1.

If that is a posibility how do I configure the AirCard?