The keyring one not only fits over your gpio pins but you could on theory solder it to an extra long gpio header but would lose the ability to swap over sides.
Anyway back to the tutorial, first get all the components out as the solder iron heats up.
As you can see the protection fuses come already soldered.
Next upwas the inner breakout pins, once in place I flipped it over and used tweezers to slightly adjust the angle so it sat correct before soldering.
Next wasthe outer pins, these pretty much stayed in place as I turned the board over but you could use blue tach or putty to keep these in place if they move.