Synergy 5221 - 07-10 Jeep JK 2/4 Door Front Cage Kit - Manual (Page 24)

35. With the dash trimmed, test fit the A-pillar tube 522103-01. Note that the A-pillars
are L & R side specific and are labeled as such. Be sure to fit the correct side, L is for
driver.
36. The tube should lock into position by pulling the bottom of it back and towards the
outside of the floor plate. Meanwhile, the top of the tube should lock into place based
on the notch.