The hinges that fit on the cowl needed to be marked for drilling, bent and fit on to the airframe. In the picture, you can see tiny black dots on the section of hinge that is curving over the battery. Also note the small bronze colored pins directly above the overflow bottle cap. Those pins are a pain to insert! There’s also a small hinge just to the outside of the battery and outside of the oil canister.
Hinges installed on airframe