Hi Mizdee,
I’ve looked over the pattern - there is not cut out for the door, it is applied as a decorative piece during decoration.
When you’re looking at the pattern the A/B pieces fit together and the door is positioned on the right hand side of the 2 windows and the left hand side of the 3 windows (ie where the 2 pattern pieces join). If you want a cut out, or want to cut a door piece, use the windows as a guide for how big you should cut your door and then wing it

. Or just make a door from fondant or candy when you decorate

Edit: I just looked at the photos and compared it to the pattern, the photos and pattern appear to be swapped in terms of the number of windows on the left and right. But basically just put the door between the two A/B pieces that you tape together, it’s the only section of spare space on the panel.