They were originally designed around Di2. Notice the wire hole is below where the shifters are. eTap clics have wires that are behind the shifters so the wire hole is pointless. Same with mechanical. Di2 TT shifters have the offsetting wire that doesn't come directly from behind the shifter.
Favorite Gear: Dimond | Cadex | Desoto Sport | Hoka One One
Favorite Gear: Dimond | Cadex | Desoto Sport | Hoka One One