Toyota highlander 2015 Instruction Manual page 31

Fastening the seat belt (for the third center seat)
1
Take the plate out of the holder,
and then pull down the seat
belt.
2
Push plate "A" into buckle "A"
until a click sound is heard.
3
Push plate "B" into buckle "B"
until a click sound is heard.
HIGHLANDER_U (OM48E98U)
1-1. For safe use
Plate "A"
Buckle "A"
Plate "B"
I n f o r ma t i o n P r o v i d e d b y :
31
1
Buckle "B"