Doc, I installed a Schnell, and the instructions were worse. I ended up using both the Schnell instructions and the B&M instructions together to get it figured out. I just tried to find the instructions I used, but I can't seem to find them anymore. I did run across this document, which, hopefully is different than what you have. I'll keep digging for my source.
http://www.bmracing.com/media/products/pdf/67.pdf