Actually, you had them the right way, or rather the factory way, in the first picture. However, you'll find the bars are a lot more comfortable flipped like you have them. I'm planning on doing the "flip n swap" this winter as soon as I get the chance. I sat on a bike that had 'em this way, and it was waaaaaay easier on the wrists. So you're a step ahead...however, you may need to drill a hole somewhere. You can find directions for the "clip on flip and swap" very easily in the Club Cafe posting section.
If I remember correctly, the bolt is a 6mm, and uses a 10mm size wrench. The bolt is there to stop each individual bar from rotating and just needs to be SNUG; be careful not to strip the threads in the aluminum. It's a good idea to use blue Loctite on these and all the pinch bolts of the triple clamp/handlebars. The pinch bolts are critical fasteners and need to be torqued to 27Nm.---James.
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