The HIC is pretty much like the SCS, you thread a bolt into a star nut in the forks to compress the headset and remove play.
Unlike the SCS, with the HIC, your OverSized 1 3/8" bars (RAD Bars) slide right over the compression system, and use a normal clamp (Like the Proto Half Knuckles, for example).
The compression system has 2 slits in it, so when you clamp the bars, it is clamping onto the forks. So your alignment won't come off if you tighten the clamp enough.
Edit: Everyone who tried to help him, you should take the time to read what he's really asking. He doesn't need to know how compression systems work, he wants to know Specifically about the RAD HIC.