help about my vitez knob :)

big version

I changed our gear ball in the picture, my car is the 2006 model.

but as shown in picture 1, it was completely out of the bun. that is, I could not separate the part in picture 2. It was disgusting that I fastened it under the gear knob with a black band. what can I clip the bellows with what I would recommend, the yellow gear lever seems to be original, it slips, the band is pulling up please help