rotate object to touch position

Hi all,

I am using this script

But I want to rotate my object instead of moving it ( I want to shoot at a target at my touch position, so my turret has to turn first). I tried different things but it is not working.

Could anyone help me out with this one? I still want to be able to use the finger id :) that is why I like this script so much. Don't know if it is still a good script though?

greetings and thanks in advance, Aaron