Buy Assembly Instructions: 1.) Parts 2.) Place one Xbee Shield on the an Arduino 3.) The PC module is ready to go 4.) Setup the Backpack with screws and dowels 5.) Attach the Backpack to the DoubleTall ExtenderShield 6.) Insert the DoubleTall ExtenderShield into the Arduino 7.) Connect the stripped wires to the Backpack 8.) Red is +5V and the Black is for Ground 9.) Rest the TouchShield Slide onto the ExtenderShield 10.) Connect the Xbee Power Wires to the ExtenderShield 11.) Attach the other end of the stripped wires to the Xbee 12.) Place the Xbee Shield on top of the Extendershield 13.) Connect the Backpack wires to the TouchShield Slide 14.) Red is +5V and the Black is for Ground 15.) The final step is reattaching the Slide 16.)yay!