I have taken the front off my GrandVista 250, I would guess the D/T300i is similar. (PS I have had a 300i too, there is a on-line Service manual you can find when you search for it, and also the detailed parts drawings may help you to see where the screws are).
All screws I removed on the G/V were on the driver's side, in this case six in total, plus some windshield screws to make it all come loose. Maybe this will help you.