We have a video on our Advance Termite Bait System page which shows exactly that; how to install the stations. You can watch the video on this page.
http://www.domyownpestcontrol.com/advance-termite-bait-system-pro-kit-10-stations-p-1331.html
The lid on the Advance Termite Bait Station is removed with a Spider Access Tool. Please look at pictures 12 and 13 on page 4 of the Advance Termite Bait Station Guide. These pictures illustrate what it looks like when termites have started invading the bait station. Once an infestation has been identified, the plastic inspection cartridge would need to be changed to an Advance Termite Bait Cartridge. Both the wood monitoring base and the plastic inspection cartridge should be changed every 12 months and the wood should be changed more often if it becomes very soggy or moldy. Please watch our Advance Termite Bait Station video for some great tips for using the Advance Termite Bait Station System.