They aren't designed for it at all, but the opening nearest to the shifters is quite large and near the corner so it's easy enough to thread up with the wires with time and patience.
On reflection I could have done this with my original ergonova bars but I never understood why my 'aero' bike came with ergonovas and have been itching to make the change since purchase.
Haha exactly!
Actually you can buy most of them from bike-components.de, i got all the new di2 bits I needed there and their delivery cost really isn't too bad when you review the savings.
They aren't designed for it at all, but the opening nearest to the shifters is quite large and near the corner so it's easy enough to thread up with the wires with time and patience.
On reflection I could have done this with my original ergonova bars but I never understood why my 'aero' bike came with ergonovas and have been itching to make the change since purchase.