Hmm...the graphic is from their website. I will have to contact them and ask.
It is a bit confusing but on the Icom page for this, it includes an image of what is used to connect the 7000
The current brochure for the RS-BA1 in that link you sent doesn't have an IC-7000 that picture.? I doesn't mention it.? I know it's an obsolete product now, that probably has something to do with it not showing up.
The reason I asked was that I had looked in the brochure and didn't see the IC-7000.?

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W4ATM - 35 Miles south of the Kennedy Space Center
Retired RF Design Engineer
Now able to play with all the hobbies I never had enough time for