Start with the box, I Link ethernet hooks to it.
Then you need an adaptor for the Helix 7 to use the MGI in the trolling motor, hooks directly to the 7.
Next you will need 2 ethernet cables with ethernet hook up adaptors for each unit coming off the 5 port box. I put my box close to my console unit so I did not have to buy 2 long ones, use the 2 foot for the console unit and then a long one for the up front unit.
Hope this helps some.
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