SGZC12RC - How is parking mode engaged

[Street Guardian USA]

My current switch layout on the Multi Safer BDP device is as follows to get 12v and 6 hours recording time.

However, after turning off the ignition and observing the cameras, they only stay on for about 1 minute after switch off. Also, I noticed the rear one decided to reboot itself after switching off the ignition

You have Multi-Safer in the wrong ACC switched mode then. Start the car and press the round Multi-Safer button and try again. Or you don't have the BAT constant wire hooked up to a constant fuse.