Took me a while of searching but i found it. Im cheap and dont wanna buy a harness kit so hope this helps other people like me.

2008 Scion xB Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Light Green
Car Radio Switched 12v+ Wire: Gray
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: Green
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Orange
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Pink
Left Front Speaker Negative Wire (-): Violet
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Blue
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Red
Right Rear Speaker Negative Wire (-): White

i think the site i found this on was called modifidedlife.com

 

I would say, this was very helpful. In replacing my car stereo, I recognized that there are obviously two "Light Green" wires.

I realized the "Car Radio Constant 12v+ Wire" was actually: Light Blue
and the "Right Front Speaker Positive Wire (+) was indeed: Light Green

Wanted to add this for anyone working on this in the future

Good Luck!

 

Ayuda compre un radio china android, tengo un scion XB 2008, he conectado todo menos el SW1 y SW2 no sé en qué cables conectarlo, he buscando diagramas pero realmente no encuentro algo, alguien ya ha conectado y podría ayudarme por favor