Community Member Credit: Froggmann

It’s very simple to wire but you will need the plug if you want to use the factory button. Sunshade, not so much but it’s good to have a disconnect.

Wiring is real simple:

Black: Ground you can tap into the one under the bolster on the driver’s side of the car.
White: 12v Power. Since you are running wires anyways make a 3 wire harness and tap it into the power on the back of the armrest.
Red: Up signal
Green: Down Signal

Basically, the sunshade is always hot, and supply’s power to the red and green wires. Once one of the grounds is triggered, the shade will go into operation in the direction it was grounded (Red gets grounded, the shade goes up. Green gets grounded, the shade goes down)

A simple way to make a harness:

Grab about 15 feet of wire equal lengths, 14-16 gauge in three different colors preferably red, green, and white. Tie them to a stationary object and stretch them out. tighten your drill chuck on one end and then start twisting. GO until it starts curling over on itself.

As for the factory button, if you can’t find a plug for it then temporarily install a momentary “on-off – momentary on” switch and just poke it out under the center console. 2nd gen I30s are getting a little more common so you should be able to find the plug sooner than later.