Your better off undoing the lower ball joints, left/right, then undo the two hydrolic lines
and finally the two retaining bolts and drop the whole thing in one piece.
Take it to a bench and put it in a vice (drain the fluid) and unscrew the arms from the body.
It should unscrew from the SS flanges at the end of the body, which you may need to grip while unscrewing the arms.
Once both arms are free, then screw them into the hicas cancell bar, recirculate your hydrolic lines, fit the unit and get a wheel alignment done.