[amsat-bb] IF-100 kit schematics

Can anybody help with the schematics for the IF-100 rotator interface please?

I have got a used one recently on the eBay, alais no schematics. The serail/parallel connectors need to re-wired though...

There is a document from Ricofunk on the amsat-dl.org site but it refers to a ready-made device, whereas mine apparently is a kit version.

Appreciate any help,

73