Anyone else who could shed some light on this?
What more do you need? You've been told you need to remove the panel with the curved shape in the front compartment, and that is
only fastened in with rivets, so it is obvious you have to drill them out to remove it. Those two bolts you have marked are nothing to do with the fixing of the panel. Don't undo them until after the panel is off. They only hold up the bracket holding the fan housing. Once the panel is off, you disconnect the wiring socket, then you remove the bolts to be able to remove the fan housing. Once it is out you can strip it to get at the motor.
Yes, the panel that should overlap the motor panel is missing, and you can see it is letting all the muck thrown up by the wheel into the front compartment - I have never seen such a dirty interior. You need to replace that after fixing the fan motor.
Roy