The shield comes with 0.1" standard header. Standard header does not permit stacking but it is mechanically stronger and they're much less expensive too! If you want to stack a shield on top, do not perform this step as it is not possible to uninstall the headers once soldered in! Skip down to the bottom for the stacking tutorial
Next, you will attach the terminal blocks, power jumper and servo connections
After you have installed either normal or stacking headers, you must install the terminal blocks.
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!
You might have to sort of angle the part a little to get it to fit into both sets of 3-pin holes. we did this so it wont fall out easily when you turn it over!