hilux 2007 steering wheel upgrade

[paul searle]

hello, i want to fit a 2015 steering wheel with audio/phone etc buttons to my 2007 , i have an aftermarket head unit that can be programmed so i dont need any comments that say it wont work thanks, 

my question is for experts in hilux wiring looms, there is a 28 pin plug that goes into the head unit for the wheel button controls and i want any info on these wires, i have the plug from the truck it came off, with short wire tails so i can see what colour they are etc, but my 2007 wont have that harness? can i run these wires in? any help from experts appreciated, dont bother replying if your answer is "cant" or "dont" or anything else unhelpful, i just want facts not criticism 

[paul searle]

basically a detailed wiring diagram of the steering wheel controls and where they go would help so i could add the wires to my loom myself