Hey everyone, I'm working on a door lock that consists of an Arduino Uno, PN532 NFC Arduino shield, and a Parallax continous rotation servo that will be connected to a dead-bolt door lock. Currently I have the NFC shield soldered to the Uno, (like thishttps://www.adafruit.com/images/970x728/789-00.jpg) it works correctly. I would like to connect the servo to this setup through the pass-through connectors on the NFC shield itself.
I'm basically going to set this up: 
With the golden pass-through circles on the shield:
Is that going to be a problem power-wise? The arduino will be powered by the USB 5v to my laptop, and the servo takes 5v.