You can connect a powered subwoofer to the Connect:Amp wired to the outdoor speakers. The subwoofer output is disabled on the other Connect:Amp because it is being used as surrounds for the Beam.

Ok that’s what I was thinking. Thank you for your input. 

Ok I finally got this set up. Connected the amp to the deck and it works. However, I can’t “add sub” and I’m assuming it’s because it’s not a Sonos sub. 
 

my biggest issue now is I don’t want the deck speakers on but want the sub on while I’m listening indoors. Is there a way to independently control speakers through the amp?

thanks 

However, I can’t “add sub” and I’m assuming it’s because it’s not a Sonos sub. 

The “Add Sub” feature is used only to add a Sonos Sub or Sub Mini.
 

my biggest issue now is I don’t want the deck speakers on but want the sub on while I’m listening indoors. Is there a way to independently control speakers through the amp?

With your setup, the subwoofer works together with the outdoor speakers. You can’t just use the subwoofer alone with the indoor speakers.

Thanks