okay, simply put...do you have pigtails? If not, why not source some pg tails to help the install be easier than chopping up the harness, extending some wiring and doing a "hard solder".
If you have the pig tails, and you have the wiring setup, do you require finding the pin outs or diagram and soldering into that with the new DCCD controller on the WRX?
Two different things going on there. No controller with ready wiring, no controller and wiring required.
I'm only asking as to the extent of the work is all.