I greatly suspect you will have to have something like that machined. I have a kinor 35H myself, and from my experience using several arris and even eclair, camera "attachments" with the exception of a few things like the tripod screw, weren't meant to "go together". I had a tripod plate for the kinor machined. Took about a day or so, but since you're not dealing with electrical components or complex mechanical parts, it shouldn't be too difficult.
Sorry if that didn't help as much as you had hoped.