How to attach cables to ceiling using curved nails or hooks
The trunking is fairly rigid and can be put in most locations without gluing it to the wall or wallpaper.  It merely serves to cover and contain the wires which are already safely covered.

You could cut the trunking to fit the run you want, enclose the wires and then use simple wire loops around the trunking in two or three places, held close to the wall with a screw and a plastic anchor.

You probably can find white coated wire to match the trunking.