Quoting Henrik Jensen
Nice work, I wonder how you have secured the front windows, it looks like two window panels pointing the studs outwards ? I like the idea of using Minifigseats for fenders.
For the windscreen, I have used a bar on which two horizontally-pointing hooks are fixed vertically, with its studs pointing outwards as you noted correctly. On the stud of each hook, each half of the window is fixed.