Toyota TUNDRA 2004 Owner's Manual page 313

Type C
304
'04 TUNDRA_U (L/O 0309)
To fold down the armrest
with the auxiliary box
To return the armrest with the auxiliary
box to the original position
Type D
Type E (under the rear seat of access cab
models)
Front
Type F (under the rear seat of double cab
models)
2004 TUNDRA from Sep. '03 Prod. (OM34426U)
Front