I had two 3.5 mm and one 2.7 mm screws. But, the 2.7 mm screw was top right screw and the two 3.5 mm screws were on each side of the connector.
Hello. I used a 1.5 mm flat screwdriver from iFixit Pro Tech Toolkit. It worked easily for me.
I removed the Lightning connector cable assembly, but it does not stay connected to new rear case that I added it to. Is there any recommended tape/adhesive to solve this issue?