Dynamo Lights

That is pretty good! Was hoping for a diy verison if that when I set mine up 4 years ago but couldn’t find a switch the fitted nicely enough.

i need this but dont really need this.

Any idea how Specialized routed the dynamo output cables into the handlebar?

That is very trick. As above zero use for it, but somehow want?
Di2 bars have various holes and slots in them ;)

One was on eBay last week