My opinion, would be, it would be fine to put them both parallel to the Second metacarpal
At least 5mm, is Amals recommendation.
I don’t have 2 side by side myself, but where my NExT is placed, I would be comfortable that I could get 10-12mm separation from it ( I would say I have average sized hands)
Here I am ASS-U-ME-ing with CompGeek as a handle, you work with computers… Maybe you do, but you do a lot of “Judo Chop” of Computers and the users.
Did you see @Vicarious post the other day, showing his placement locations?
He had 22 on that day, now I think he has 23…
Have a look in WIKI - BEGINNERS GUIDE to implants & becoming a cyborg 🤖 in the “where can I put it” section ( The x-ray image he was saying is outdated with ONLY 14 ).
I’m sure there will be somebody with a side by side arrangement that can confirm it for you
Who is doing the install?