Above the water pump to the right there's a fill plug where the radiator hose attaches. It a recessed Allen head I believe. Back that out, put a funnel in the hole and fill with coolant, then install the plug.
After that I believe you're supposed to cycle the engine on and off a few times with the radiator cap off. Just let it run a few minutes to warm up to then shut it down. As it cools it should syphon some fluid from the reservoir. Do that 2 or 3 times, put the cap back on, top off the reservoir and you should be good.
It's a sealed system, you need to get all the air out of the lines.