Default HOWTO: Logitech F710 Wireless Gamepad?

I have a Logitech Wireless F710 Gamepad that I'm trying to connect to my Nexus 7 (2013). ... The gamepad comes with a USB dongle, that I've attached to the Nexus 7 via this USB OTG adapter. Unfortunately, the Nexus 7 does not react in any way to the USB receiver being plugged in or removed. Any suggestions? Does the USB OTG adapter have to be powered by external source? Or, did I get a flaky USB OTG adapter?

If someone can help me get this working, I'll turn this first post into a more traditional HOWTO for future readers.