it should reach just fine.. i only had to extend one plug on the back of my stock harness for my b18, & i just cut it out of the loom & taped it up nicly so nothing hit the wires.. it's all good now.
nobody said customization was easy, gonna have to think outside the box a lil bit. if all else fails, extend those wires. just be sure to take your time & do it right if u have to extend them.
best of luck to ya, i kno it can get frustrating at times.