Locate the charging port on top of the motherboard, and look at the back end of it for a row of contacts.

Desolder this row of contacts that directs power into the motherboard, ensuring all solder is off the contacts.

Flip and prop the motherboard up with the bottom side facing you.

Information on how to solder and de-solder components can be found here.

Many small components are soldered just next to the contacts to be removed; touching these with the soldering iron could damage the motherboard or components.