Toyota 2003 Tundra Owner's Manual page 172

Type B (front console)
172
'03 TUNDRA_U (L/O 0301)
To fold down the armrest
with the auxiliary box
To return the armrest with the auxiliary
box to the original position
Type C (front split bench seat—only when
the armrest is down)
Type D (under the rear seat—only when
the bottom cushion is up)
2003 TUNDRA from Jan. '03 Prod. (OM34421U)