If he was doing it right people that shelled out 50 or 100k wouldn't have to wait perhaps hrs for recharge. I call BS on the pic, there are numerous open slots to charge and the sheep prefer to wait in line, oh wait that's a time honored Costco issue.
You would be better served by taking the time to trace those wires back to their power source and severing at those connections. Total wire removal doesn't have to occur. You then could snip the wires as you suggested. Best not to leave long runs of capped powered wires IMHO.
Simply being tight isn't the solution, connections must be shiny clean as well. I have seen issues where there was significant corrosion and terminals were cleaned but the issue was in the cable just adjacent to lug, ie: out of sight. Temporarily isolating the Genesis will tell you a lot.
Leave it open because just as soon as you hard mount something a new-can't-do-without product will appear. You might also keep an eye on the screw/bolt head that appears thru the shovel head, it may wear a hole in your MWC?