Hmm...side frame?
The entire frame is called the chassis. Using the terminology "chassis rails" for the main rails of the frame, and "outriggers" for the short parts that stick outboard of the chassis rails and "crossmembes" for the parts that span the chassis rails would help our understanding of what you need a photo of.
Here's a pic of my bulkhead outrigger just prior to replacement. I think that may be what you're looking for. Of course, the chassis alignment diagrams from the WSM may be helpful also.
--Mark
1973 SIII 109 RHD 2.5NA Diesel
0-54mph in just under 11.5 minutes
(9.7 minutes now that she's a 3-door).