2010 Toyota Tacoma Regular Cab Owners Manual - Page 347

3-6. Other interior features Insert the locking plate into the deck rail, rotate the tie-down cleat 90°, and release the thumb wheel. Slide the cleat to the closest detent in the rail system. You will feel that the locking plate snaps into a detent. Tighten the thumb wheel in a clockwise motion until the clutch mechanism ratchets. Check the tie-down cleat to confirm that it is locked into a detent and securely mounted to the deck rail system. 328