K- locate the controller relay. It is that strange looking thing that is hanging behind the wad of wires in your pic.
It will have 4 wires going to it.
Green, Black, White, and Grey.
Pull the Wh and Gry wires and connect them together.
Given the same conditions listed above, the dash display should light up, and stay lit showing the -04 handbrake applied warning.
Verify Y/N?