I added two layers of shrink tube to the exposed areas of the derailleur power cord because I didn’t like how dainty and vulnerable it is! The two layers of shrink tube in the two expose areas make the wire much more stiff, and obviously thicker, which makes it almost the diameter of a brake line. (Not flopping around in the wind) It looks much better in my opinion and fills the frame pass through hole better as well.
I also installed Cannondale frame cable grommets as they are much higher quality than the ones provided and I had them from a previous build.
I also didn’t like how the derailleur power wire stuck out by the drop out, which made it very vulnerable for getting snagged. So I installed a plastic cable hold down using a stainless M5-0.80 x 20 bolt that goes through the factory hollow dropout fastener, and the nylon lock nut fits perfectly inside the drop out allen fastener on the inside so you only have to tighten the bolt on the outside, while the inside dropout allen holds the nut from rotating.