They are in both shifters (you can see the black box in the shifter pic i posted). They are small, like about 1 cubic inch and the wires plug directly into them. Come to think of it, a budget build could be done by doing rear shifting only...then all youd need is the r shifter, rear derailleur, and battery mount.
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Re: DIY Ultegra Di2 TT [styrrell]
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- Post edited by locutus (Cloudburst Summit) on Jan 31, 12 20:52