How do these carousel shelves work?

nubsj

Second hand kitchen has a carousel in the corner unit

I can't figure out how the shelves should sit
There is a white plastic bracket under each and pin holes in the supporting pole but nothing to go in the holes

Each shelf has a small metal 'tag' underneath but these don't sit in / on the plastic bracket as I'd assumed they should

Does anyone have similar and can shed some light on how I can fix them?

I tried putting a screw through the pin hole but that didn't hold the shelf securely

I'm
Trying to attach a picture but, shamefully, it seems to be beyond my technical capability

Thanks

nubsj

Taa daa

nubsj

Oh. Has it not worked?

[IMG]http://[/img]

nubsj

Still not