http://willswing.com/pdf/manuals/om_T2_4th_edition_June_2009-r1.pdf

Or you can:

Twisting a tip.

After you have made everything symmetrical, if you still have a turn, you can
correct it by rotating one or both tip wand receptacle end caps. A left turn is
corrected by twisting the left sail plug counter clockwise (moving the wand
receptacle down) or twisting the right sail plug counter clockwise (moving the
wand receptacle up), or both as indicated on the labels at the end of the
leading edge.

Twist clockwise on either or both plugs to correct a right turn. Note that the
mechanism of adjusting the sail wand receptacle for tuning out a turn in the
glider is the same as performing the same tuning function on a conventional tip,
although the direction of rotation seems to be opposite. For example, to remove
a right turn, if working with the right wing tip, you would rotate the end cap
clockwise, so as to rotate the wand down, thus depressing the right wing tip. On
a conventional wingtip, you would rotate the end cap counter clockwise, because
doing so would rotate the wingtip downwards. The aerodynamic effect is the same,
even though the direction of rotation appears at first glance to be opposite.

Adjustments are best made in one “notch” increments. If you have rotated the
right wing down both available notches, and still have a right turn, you can
rotate the left wing up. To rotate the tip wand receptacle end cap, remove the
screw, rotate the cap to align the next hole, and re-install the screw. Note
that it is acceptable to use up to three holes of adjustment from the initial
center position, even though the caps are normally only drilled with two holes
on each side of center. You can drill a third hole at the same additional
distance if you need more adjustment