handbrake/parking brake power lead for alpine head unit

[CBates12]

i need to find this to be able to activate all the video components because its a safety option
any idea where to find this wire?

thanks

[thekid93]

just earth it to anything so its always on. if ur rly pickee put a switch some where so u can turn it on and off.

then u can use the dvd player for a dvd player and other ppl in the car when watch while driving