Chosen Solution

I am doing my first repair and learning quite a bit, however some of the female bases that screws go into are missing. There is a large hole that looks like a press fitting with female threads would go in. Am I wrong and if not can those fittings be purchased, also how do I prevent them from falling out?

Can you post a photo? What repair are you doing? What have you dismantled at this stage? Have you arranged your screws in a map of how the came out of the phone?