In order to have a plug and play system, you would need all the wiring pre-installed by the factory, which it is not. No matter who makes these HID retrofits, you will get a wiring loom, that you need to install, and plugs you need to insert together. You will need to figure out where to place this wiring loom.
The wiring loom will come with a trigger on the drivers side light, a relay, plugs for the passenger side ballast, a ground, plugs for the drivers side ballast. These plugs connect to the ballasts, which then has 2 plugs which plug into the HIDs. You will have the OEM plug, and if you asked for an LED strip, or angel eyes, or some other add-on, you will need to wire these up. It does not matter who you buy these HID retrofit headlights from. The only difference will be the cost of the retrofit, and the quality of the wiring loom.