AIrcard 790 remote access

I have the follwoing set up at a remote house.

There are two Air Card 790 mobile hotspots, both in DC112A cradles running different networks. There is a computer (Mac) at the house that is connected to both, one via ethernet and one via wireless.

I can access the remote computer  and run Netgear Genie, I can see both DC112A cradle / routers and login in separtely, however when ever I try to access the Air Cards remotely via any method I only get the unit that is in the cradle connected via ethernet. In the network settings on the Mac the ethernet is the priority net work. I'm reluctanct to turn this inactive as I'm not sure that the "wireless" Aircard is connected to internet as not seeing any usage on my account. If there is a problem then I'll lose access to the remote computer. Can anyone advise alternate strategy.