Video courtesy of 'Yellow Peril' (Ken)
The hardtop fits with the soft top folded down, If your soft top clips on then the hard top will clip on the same place.
There are fittings for the hard top just behind the door.
In Whiz's pic below you can clearly see the adjustment screw, just move the foot up and down until it lands nicely on the fixed bracket and clips firmly with no play but not excessive force as you do up the over centre catch. You only need to do this the first time you fit it
I think it would be pretty safe to assume that the hooks on the hardtop will be there. But you will need to check that the brackets on the soft top frame are there (as shown in PQD44's picture above).
When I bought my green hood I had to take the ones off my old black hood. They are quite small and not fixed to the frame itself. They are held in place by the bolts that secure the hood to the car.