Lexus RX300 2003 Owner's Manual page 265

40R003a
"
1 Joint
2 When removing the jack, turn the joint by hand in the
"contract" direction until the jack is free.
3 When storing, turn the joint by hand in the "expand"
direction until the jack is firmly secured to prevent it
from flying forward during a collision or sudden
braking.
40R004a
To remove the spare tire:
1 Remove the spare tire cover.
2 Loosen the bolt and remove it.
When storing the spare tire, place it with the inner side of the
wheel facing up. Then bolt the tire in place and install the spare
tire cover to prevent the tire from flying forward during a
collision or sudden braking.