OK, thanks guys.
Joe's explanation and Jordan's picture identified an additional clamp that goes on bottom part of the crossmember.
Gernold supplied a picture of what goes on the bracket on the front of the crossmember. It is a small bracket with a rubber pad that supports the front edge of the fuel tank. The bracket looks to be PN 113 476 00 36.
I have got to say that Gernold has been a huge help to me on this project, sharing pictures, giving advice and talking me through various procedures, providing parts at reasonable prices and helping me find suppliers for stuff he doesn't have.