How do you secure in place a polymarble vanity sink/top?

[Mini Me]

Here is the manual for the vanity top/sink https://www.baindepot.com/media/ftpbaindepot/pdf/VT-SQ19-041217.pdf
Here is the manual for the vanity cabinet https://www.baindepot.com/media/ftpbaindepot/pdf/19-VW1203WAL-124K3.pdf

Apparently it just sits on top of it. I doubt that connecting the tap to the supply lines and the drain to the plumbing is enough or it is a safe way to do it. I would have an wall to the left of it and to the right within 1/2" of an inch the shower panel glass so might not look like a big deal if it moves but it might damage the sink drain

 

[Determinedkvb]

Going by my experience having a simple stone top on an island installed . . .

Shims inside between top and cabinet to level. Then Silicone around inside edges. Adhesion could be reinforced with small blocks of wood added at corners.

Silicone holds but allows for removal without tearing everything apart.

 

[Sponsor]

 

[Mini Me]

Yeah probably silicon adhesion pver the entire perimiter of the cabinet sink contact zone might secure it inplace properly plus the top edge in contact with the wall siliconed

Thank you