I had unfolded the rear end of the front wings from the A-post earlier. The folded edge at the air intake had I decided to leave until the bonnet frame were disassembled.
The picture shows the rivets at the sides of the bonnet frame. The rear rivets, towards the bonnet hinges, are steeel. The frame is also rivetet to the bulkhead and welded to the front crossmember.
The bonnet frame and the electrical equipment to an old elevator. Note that the rear parts of the wings and the scuttle are still in place.