All that talk of Y cables on the last page had me thinking nobody here is down with soldering irons and heatshrink.
The Shimano cable is incredibly tough, but you only need it to be like that outside the bike; you can just splice it to the inners of a USB cable (I plaited the two wires with fuzzy twine for silence). With E-tube, all the components are in parallel, so you can wire it however you like. Mind you, splicing those E-tube cables is a bit fiddly due to the amazing toughness of both layers of insulation.
All that talk of Y cables on the last page had me thinking nobody here is down with soldering irons and heatshrink.
The Shimano cable is incredibly tough, but you only need it to be like that outside the bike; you can just splice it to the inners of a USB cable (I plaited the two wires with fuzzy twine for silence). With E-tube, all the components are in parallel, so you can wire it however you like. Mind you, splicing those E-tube cables is a bit fiddly due to the amazing toughness of both layers of insulation.