It's a Delphi Micro Pack 100w series terminal.
A quick search turned up this one.
Or, 12191068 is the part number of the cover. Type that into Mouser's website and you can hunt down all the parts to make your own terminal.
But, it's easy to add the pin to your current terminal.
The pins are Delphi part #12084912. (12084913 will also fit, but they're made for a smaller wire gauge.)
Go to your local Chevy (or probably any GM) dealership and tell them you want some terminals in "Delphi Tray 5". Look for the part #. (Most have been lower left corner.)
Or, Mouser part # 829-12084912
Pick up a couple extra pins and while you have the terminal opened up you can add wires for an ambient temp sensor for your RZR. It's already built into the speedometer.
read this thread to learn what to do.