I bought some di2 sprinter shifters (R610) to have on my aero extension bars. I wanted to have a set up similar to the Sram etap blips and remove the bar end shifters. As the plugs on sprinters are different to the normal e-tube wires, i also purchase a standard di2 wire, cut it in half, spliced the wires and twitch them to the same colored wires on the shifters. It all seem to be going to plan until i hooked it all up....then nothing. The e-tube app on my computer didn't recognize them either.

Am i trying make the impossible possible? What am i missing? As the wires on the shifters are a little thinner than the standard e-tube wires, would that be the problem? I dont want to bin these new shifters so if anyone can help it would be great!