Datasheet
That's it! Now you can install the terminal blocks and
jumper...
Installing Terminal Blocks and more
After you have installed either normal or stacking headers, you must install the terminal blocks.
Next we will install the terminal blocks. These are how
we will connect power and motors to the shield. They're
much easier to use than soldering direct, just use a small
screwdriver to release/attach wires!
First, though, we must solder them in.
Slide the 3-pin terminal blocks into 2-pin terminal blocks
so that you have 2 x 5-pin and 1 x 2-pin blocks. The two
5-pin sets go on either side. The 2-pin piece goes near
the bottom of the shield. Make sure that the open holes
of the terminal blocks face out!
Flip the board over so that you can see & solder the pins
of the terminal blocks
© Adafruit Industries https://learn.adafruit.com/adafruit-motor-shield-v2-for-arduino Page 13 of 43