Networking question

[94gts]

First time using this forum. I used the older one once with great success and hoping to keep that going.

On my boat, my electronics consist of an e120, DSM 300, and what I think is a b260 airmar. I also have an ev-200 autopilot.

Recently, I aquired an E7d. I'd like to use that as a replacement for the e120. I know I can get the adapter (E66066 I think) cable to hook my transducer directly to the e7d but I do fish the canyons in deep water so I want more than 800 ft max. I've done a bunch of searching and came up with what I think will work but I just want to verify first. Looking to have everything talking to eachother......

-E7d to ev200 through seat talk ng

-B260/Dsm to e7d via sea talk hs (Ethernet) with adapter cable (a80160 I think) to the NETWORK (not transducer) port on back of e7d

Please let me know it that last cable is correct. Thanks so much!