The Stratux "talks" to the 740 over Wi-Fi. The Stratux is the Wi-Fi hub, and you connect the 740's Wi-Fi to the Stratux network. You do not need a password or encrytion code. You then tell the 740 to recognize the Stratux ADS-B source. Go to 'Menu', 'About' and 'Connected Devices' in the 740. Auto-Detect will probably come up, and the Stratux will likely be the only choice. Select it, and you're good to go.
I don't know anything about the D10 connections though . . .