These all are various components that can be removed with a soldering iron

USB 2.0 Port has 4 pads and 5 pins attaching it to the logic board

Various Switches- 4 pads each. From the (Bottom left), Volume up, Volume Down, Mute?, (Top Left), Power on/Hold, Reset

Line In Jack 4 pads

Headphone Jack 4 pads

Play/Pause Button 2 pads and Back Button 2 pads

LCD connector and Navigtor button