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This is a video of me showing how to install the di2 junction box inside the Specialized Tarmac SL7 and it is a very similar way as the specialized venge seat post junction box too, I just did this just incase you need to remove the seat post in the future or if you ever need to change a battery for some reason or maybe even install a d fly for the battery levels
If you have any questions please let me know down in the comment section below and I will try to answer them as soon as possible.
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