Hey guys I bought a Kenwood BT555U head unit for my 2003 Galant GTZ. I just want to make sure where the amp wires insert on the head unit (the purple, green, white, and grey ones). Pictures are attached. Thank you

Metra Harness: http://www.metraonline.com/part/Mits...arness_70-7003

Kenwood rear: http://www.kenwoodusa.com/UserFiles/...55U%20BACK.JPG

Kenwood front: http://ecx.images-amazon.com/images/...ZL._SY300_.jpg