Help unlocking rear shoulder belt latch

I would like to remove the rear seat in my 2019 Double Cab. I couldn't figure out how to unlatch the center shoulder belt, and couldn't find this in the manual. Anyway know how to do this? Thank you!

 

That doesn't come apart.
I think it is one of those deals where once it goes in, it doesn't come out.
Probably made assembly line assembly easier.

When you remove the seat belt bolt from the cab, it will feed thru the seat.
Remove all the seat and seat belt bolts and your seat will come out.
Just pay close attention while you take everything out, maybe take some pics, to put it all back in place correctly.
The seat belt routing is like a jigsaw puzzle, especially part #4..



https://parts.toyotaofcoolsprings.c...-sr5--5-7l-v8-gas/electrical--rear-seat-belts


Is has been awhile, but I've done it..