I wanted to mount Dettol soap dispenser on wall, so it won't take up space on sink and also won't stand in water.

There are two versions - one for double sided table and one for screw mounting.

Also great tip, if you are using this soap is this method of refill:

No prints necessary, just dip it in hot water for a moment, there are 2 tabs preventing you from opening. When the tabs heat up, you can pry it open. Cut them off, refill the soap and you can enjoy your favourite soap in no touch dispenser.

Just be careful - it is made from PET, so do not melt the whole bottle as it gets soft with boiling water. Best would be around 85-90°C.