Put bits of tissue in the whole of the knob before you screw it on. Use varying amounts until the diagram is at the correct angle when fully screwed on.
I think it should be same as most T5 gbox like the sagaris; if so the aluminium collar under knoib can be turned clockwise with and rubber jam jar lid opener thingy, then you can see a locknut which alines the knob correctly if its the same it will be easy to sort