Bend the wires over to prevent them from sliding out of the logic board.

Place the soldering iron onto the battery wire and metal connector for one to two seconds to heat them up.

Add the solder wire and wait for the solder to melt onto the wire. Once a small bead has formed around the wire, lift the solder away first and then remove the soldering iron.

Continue with the other two connections the same way, taking special care not to solder two of the connectors together.