Yes, just a matter of removing rubber plugs on original ladder, then undoing screws and removing it.
LeTech ladder supplied with 3 small and one large spacer. Large spacer goes in lower RH door orifice, small spacer lower LH, and other 2 spacers in mid orifices.
The best thing to do is then start the screws in their threads but leave all loose until they are started - long screw lower RH, mid length screws lower LH and mid, and small screws in upper orifices. These suppled screws have Allan Key heads.
That’s all there is to it.