I'll probably put the smaller one on the bow. The rear unit is sitting on the console and is further from my back deck fishing chair than the front one will be from the front deck chair. The front one is also going to be mounted on an extendable pedestal post so I can get that one at eye level if I want to. I think I want to network them so when I'm in the rear chair and my buddy is up front, I can see what is directly below the bow of the boat. Just when I thought I was done rigging out this boat.
You will need a AS EC QDE Ethernet adaptor for each unit and an Ethernet cable for that setup. You will be able to share sonar data, GPS data, and temp data in any combination you want.