I have some cable routing questions that canyon support can’t seem to answer

I have a canyon ultimate that has rim brakes/mechanical grp. I did buy it ready built. However, If I can help, just ask.

I think it’s specific to disks – there’s a cable guide between the down tube bottle bosses that secures the rear brake hose by pulling it up to the top inside the down tube with a zip tie

as the brake hose enters at the head tube underneath the gear cable and then gets pulled upwards, and the gear cable gets pulled downwards by the bottom bracket guide, I was wondering how to prevent the gear cable from rubbing against the hose where they cross over