Prepare the header strip:

Cut the strip to length if necessary. It will be easier to solder if you insert it into a breadboard - long pins down

Add the FeatherWing:

Place the featherwing over the pins so that the short pins poke through the two rows of breakout pads

And Solder!

Be sure to solder all pins for reliable electrical contact.

(For tips on soldering, be sure to check out ourGuide to Excellent Soldering).

Start by soldering the first row of header

Now flip around and solder the other row completely

You're done with the two header strips.

Check your solder joints visually and continue onto the next steps

Next we will solder in the five 3.5mm terminal blocks used to connect power & the motors to the FeatherWing board. 

Make sure the open parts of the terminals face outwards so you can easily connect wires.

The terminal blocks have interlocking dovetailed grooves on the sides.  Line two of them up as shown, and press down to lock them together as a 4-position terminal block.  It is a snug fit, so you may have to press hard.

To make it easier to keep these in place, you can use some tape to hold down the two header pieces. Tacky clay also works, whatever you've got handy!

Solder in each block, make sure you get to each of the 10 pins

Now that you're done with the terminal blocks, check your work make sure that each solder joint is done and looks shiny

OK You're done! You can now plug in your FeatherWing into your Feather and get movin'