Attaching Manual Base to Paterson Orbital?

[Roseha]

Hi,

I hope someone can help me. I have just gotten a Paterson Orbital processor from Ebay and while it looks to be in good condition, I can't figure out how to attach the round manual plastic base to the tank. The base has a smooth round peg and the tank bottom has a small hollow opening with a bar in the middle. There are no other parts I can see.
I have written to the merchant but am wondering if I am missing something since he has another one on sale and they both look like this? See photos






Thanks for any help

[Sooty_1]

It doesn’t attach, it just sits on top and is rotated by hand to swirl the chemistry around inside.

[Tin Can]

https://www.photrio.com/forum/thread...rbital.183645/

[Roseha]

Thanks everyone!