This is the text from page 15 of the TC4 manual
"Also, you can raise or lower the mounts for maximum roll-center adjustability. Simply raise the mounts in equal increments under both mounts and you can raise the roll center"
also from the same page in the section 'Ballstud Height & camber Location'
"A lower roll center will put more weight on the tires during cornering, and increases traction to that end of the car"
In that same section the first sentence says "You can raise(I think this should say lower)
the front or rear roll centre by lowering the arm mounts, or raising the inner ballstud" now I see your confusion
I hope that clears it up a bit.