I don't have one but can offer a little experience.  We bought a used 24 row 1770.  Took it home, pulled in the shed, went through it.  Converted to eSets, replaced parts, all the overwinter stuff you do.  Pulled it out of the shed and it settled to the ground and that was it.  One of  the "brain boxes" failed.  Ours was a Generation 1.  Of course none are available.  New Generation uses 1 box to replace 3.  Converting to a new Generation meant harnesses and boxes and confusion and money.  Quite a bit of each.

I told you all that to suggest your best bet may be contacting someone like AgExpress and have a harness made that is designed for your application