Go to page 23 in this manual:
http://www.mesaboogie.com/manuals/Mark%204.pdf
Keep in mind, this is for a IVb. That is from Mesa's site. Not sure if it's exactly what you mean (it's only parts on the front or back of the chassis) but maybe it will help.
Edit: Just realized most of those numbers are missing..... But a few are still on there