Let's know how the seat belt lock

Let's know how the seat belt lock
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[@mattc.310]

Interesting look at the workings of the seat belt. I suggest slowing down, show the disassembly/reassembly, and drop the music and use voiceover instead.

[@Digmen1]

That was nearly what I wanted, but my whole buckle has come apart and its in 3 parts.
I need to know how to put them all together again (unless a piece is broken or missing)