I have another question regarding the internal storage, for those that already have the full bike.

Do the cable have any sort of "guidance" inside the down tube or all they just randomly going down towards the bottom bracket area?

I ask because I've seen at least one vid from Seraph/TanTan where the cables are just loosely going down the frame, while I know some western brands manage to keep the storage clean (ex. Propain Terrel)