• If you don't wash the surfaces under the plastics by pouring water onto them like they do here, IMO it will be very hard to clean the connectors properly and therefore it will be easy for dirt to end up into the connectors in case you want to disconnect them for some reasons, like periodic cleaning. So I'd say wash the connectors, dry them with a cloth and wait at least 2 days before disconnecting them.
• I copy-and-paste what I've commented under that video: «In the manual I've read that we are supposed to "Check battery valve condition for debris clogging the holes", so I think it's important to remember that after having removed the plastics.» The valve is located between the CAN BUS and the power connectors of the battery.
