We can't really tell if the 12v red and black cables are sufficient csa to handle the current from the picture. Some have thick insulation, and heaven forbid they may be the useless aluminium cables that come with the Renogy. Also we don't normally take all 2000W from the
battery / ies unless we don't know what's watt.
Judging from the photos all I can say for certain is that a grommet is definitely needed where the wires run through the aluminium plate. I was driving a camper along the M3 towards a ferry when smoke issued from the dashboard. I screeched to a halt and shouted to wifey and children "Get out on to the hard shoulder". I reached under the dashboard, found a wire smoking and glowing red, grabbed at it with my hand and wrenched it until it snapped and the smoking stopped. Some idiot had added a radio (in the days when they were an extra) and run a wire straight from the
battery +ve with no
fuse, through a hole they had drilled in the bulkhead to the radio. They hadn't fitted a grommet so the metal hole rubbed through the insulation causing the 'fire'. It would have burnt out the campervan and we would have walked home instead of going to Europe for our holiday.
I doused my smoking hand in some water, put on a glove, disconnected the wire from the
battery and we resumed our holiday and caught the ferry on time.
However, there is no way that you could snap those thick cables where they go through the aluminium plate so before wondering anything else I would fit a grommet in that hole, and personally I would 'dress' all the wires in a professional manner. That yellow ?230v cable looks a bit as if it came out of a bin somewhere. It is slighltly incongruous that the electrician has used
Victron electronics - the most expensive and best - but not wired it safely, let alone professionally.
As for the OP not answering quickly, he was attending a wedding, so we can accept that as perfectly reasonable for not answering promptly so I hope he does not take umbrage, please keep in contact and keep posting your adventures
@Big Steve . Sometimes on forums, someone comes along, posts a question and then disappears which is disappointing, but personally in this instance I can see why Big Steve didn't immediately come back.