Vtec hookup for "mini-me"

I'm using the Vafc to run the sohc vtec head on my a6 block using the pm6 ecu. I noticed the 3 wires on the vtec solenoid. I know black for ground and the green/wht is the vtec output to the vafc. The 3rd wire is a blue wire from the vtec solenoid. Where is that connected to or is it even used on these set-ups ?