that tail light you posted is a massive piece of shit, keep shopping.
it plugs into the stock light sockets. (see how the plugs look like a light bulb?)
you'd have to buy a bunch of shit and you'd end up with a nasty mess back there. you'd be better to buy an oem tail light from someone on here for like 20 bucks, then go to cycle terminal and buy the connectors you posted, as well as the signal light connectors.
the orange is left signal, the blue is right signal, the green is ground, the green yellow is brake light, and the black is running light.