That box only has HDMI and MDP inputs, I believe. I guess you'll need a Wii HDMI converter, like this one:
http://www.amazon.co.uk/Branded-Def...ZWG0/ref=sr_1_1?ie=UTF8&qid=1287016493&sr=1-1
http://www.amazon.co.uk/Branded-Def...ZWG0/ref=sr_1_1?ie=UTF8&qid=1287016493&sr=1-1
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