I believe the manual is wrong--they probably copied and pasted from another model's manual. On my Tiger the front socket is live and the rear socket is switched, but on my Rocket 3 GT the front socket is switched and the rear (add-on) socket is live. The service manual for the rocket shows both a switched accessory circuit and a live accessory circuit. I keep a GoPro connected to the front socket and it doesn't drain the battery with the ignition off.
It's also weird that the owner's manual specifies 5 amps for the front socket when the fuse is 20 and the (add-on) auxiliary socket's guide also specifies 20 amps.