As far as we know, it's all done in the box. The HRC unit also advances the timing, so best not to muck around with other wiring mods for fear of making it go pop.

I run one with no other wiring mods and had 63hp out of it with just a few other bolt on bits (pipes, modded air box, HRC jet kit).
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball