Help with magnum upgrade to ags bmk

[Camerons]

As part of my journey to make a 2016 airstream grand tour more capable I am adding a magnum RC-ARC50 RC-BMK RC-AGS. I would love any help on where to start. It looks like the bmk is pretty easy. Install it on the negative lead coming from the battery. The ags seems more complicated. As is the networking part. There are several choices for networking. Any suggestions on where to start would be most appreciated. Thanks. Cameron

[Camerons]

Can I use a three way phone splitter to plug in the arc50. Bmk and ags Or is it better to daisy chain ? Is the Onan a three wire momentary setup. If so should I splice into these wires. Any suggestions on where to install the ags ?