Change light switch on Supernova E3 Pure (Specialized AWOL Evo)
To get a switch in your system is pretty straight forward, get one of this switches.



Make sure that you install it in the negative(common, ground, black cable, etc) lead. It's good practice and for other appliances safer. Make sure to tape everything properly and if you can, get some heatshrink wrap.

Fo the usb "The plug" I assume, just take it off as any spider cap and disconnect the terminals and take it off.