Boss HU wiring questions

[Nodrog]

I hope to install this Boss HU in my 07 sedan.
Q1-I have the Metra harness, which I have connected to one of the HU's harness. The other harness has this pink wire labeled 'Front Illumination Control (+12V)' as in the pic. I'm not sure where to connect this, and the only thing I've found on the forum is this, which I have no idea what it means;
"Radio Illumination green + radio harness"
Any ideas where to connect this wire?

Q2- I have the brown 'brake' wire, which I understand from the forums can be connected to a ground instead of the brake (it's a very short wire) to be able to watch video 'all the time'. Is this correct?

Thanks so much for any help that can be offered. I was all ready to go install the HU when all the stuff arrived (bunch of eBay purchases), but this pink wire especially has stumped me...