Here are some photos of body blocks. The rubber on the block goes down against the top of the splash apron. The splash apron is sitting on the frame webbing, the frame webbing runs from the front of the frame along the frame to the end of the splash apron and ends.
You can read more about the frame welting "anti-squeek" here on Plucks website -
http://www.plucks329s.org/pdf/studie...EAKARTICLE.pdf