Preface: Yes I searched before I posted. This problem seems to be either unique or I was using the wrong terms.
I found a 1986 Model M at work and resued it from certain destruction. Ordered the necessary adapters from clickykeyboards. Plugged it in and this is what I got, "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
The "\" is apparently not working. The button was soft to the touch. pulled the key, removed the spring, and still got the same result. Opened the case and found only 2 broken rivets.