The only diagrams I could find online were at the following site, in the manual:
http://dl.owneriq.net/9/950820db-087c-4c06-8610-296dae3425cf.pdf
You will probably have to contact Bosch for more detailed diagrams, and here is their site:
http://www.bosch-home.com/us
If you can find a local shop that services Bosch, you may be able to get them to show you the diagrams on their computer.
The title says Siemens, but when I googled it, it came up Siemens on some, and Bosch on others, but I think Bosch may have made it for Siemens, since the parts sites said Bosch, and the only diagram/manual was for the Bosch.
Anyway, hope this helps.