How to install an embedded GPS patch antenna
I would secure it flat to the roof of the box.  From this application note which is from a typical patch antenna:


  Taoglas internal GPS active patch antennas like all GPS antennas should be 
  ideally placed with a line of sight to the sky. The antenna should be placed 
  on the top of the device below the plastic housing, without metal close to it. 
  The antenna cable should not be more than 200mm so as to minimize 
  attenuation to the receiver. The cable should not be bent more than 30 
  degrees and should be routed away from noisy components such as ICs.


Taping or gluing it to the top of your box, oriented flat to the sky, should give you the best results.  Keep the antenna cable away from other wires if possible.