Datasheet
Solder in both pads, heating the pad and pins at the
same time with the edge of the soldering iron and
dipping a little solder in.
The ground (-) pin may be a little tough to solder since
the ground plane acts like a large heat sink
© Adafruit Industries https://learn.adafruit.com/adafruit-20w-stereo-audio-amplifier-class-d-max9744 Page 13 of 37