5d Mark III secondary focus point move?

I have a 5d Mark III which I've had for years and customised all the buttons etc.
For various reasons (kids, life, etc) I've not used it in ages as I've been using an M200 with the kit lens or with the adapter and my f/2.8 lenses

Anyway getting to the point now I can start carrying it around as I really miss the feel and quality over the M200, it was like second nature and pushing the buttons again from muscle memory and surprising myself but I can't remember if/how I can move the secondary focus point around.
Under custom controls I have AF-ON (back focus) set to Metering and AF start then under info it's on 'SEL' and I can them move this around with the Multi-controller.
I have the * "AE Lock button" just right of the AF-ON button set as Metering and AF start then under info it's on 'HP' "Registered AF Point".

I can't remember for the 'HP' "Registered AF Point" if I can move it around on the fly or where I register it, where is this?
It's a 10-11 year old camera but it's surprising how awesome it is

Found it...
Bit of muscle memory and googling, move the main focus point about then press and hold AF point selection button along with the light button.

Correct. And by pressing the AF selection button together with the ISO button, you can remove the registered home point altogether.

Thanks