Blindspot modules have no communication, C-CAN timeout from ESC/ABS/TCS -Wiring checks out… Bounty Available

I really could use some help on this one. I think I have looked at it too long and just feel like the answer is right there but just can't see it. Brought in from collision shop after rolling downhill and damaged rear end including replacement power hatch, replacement bumper assembly, replacement floor panel. I was able to get the power gate going after tracing the harness to a bad connector. That was day one. Moved on to the blindspot not working. I am using Alldata's diagrams - which are not complete. Some pages have 2019 wiring that does not apply to the 2020. Some pages info not released from manufacturer yet. Here is what I have done. I have verified all fuses , I have checked continuity of the high and low speed CAN to ESC, continuity in the Local CAN between Left (master) and right (slave) . Both BSM's have power , good grounds, the right hand seems to either receive power from or sends power to the crash switch where you can turn the BSM's on or off. Nothing. I can manually add power to the RH BSM out circuit to the BSM LED and it illuminates. Still even with that no communication with BSM;s . ABS/ESC works fine and all actuation test will run (will Autel) . My diagram says if continuity exists and after codes are cleared and returns replace master BSM..I did today with new unit….no change. So before I tunnel vision down on the BSM circuit even more….why I am getting ESC timeout? The weak diagnostic tree says if BSM doesn't fix replace ESC/ABS controller, but I think that is a symptom of another issue. I can't seem to get over the fact the OBD2 port won't communicate with any scanner except Autel. I even tried my GSCAN-3 . I have 60 ohms between high and lower can at ALDL connector. Power and ground check out on the port as well. I believe there is a simple connector unplugged or plugged in wrong somewhere. I just cannot find it. The Alldata does not give instruction to check the OBD2 port backwards. Willing to pay bounty! I will even let you port into my laptop or scanner via Teamviewer if that would help.