Definitely no tape. Unless you think sticky notes will work.

[He casts a doubtful look around before he spots a nearby pile of junk that seems like it might be semi-promising. He shuffles a couple busted piles of scrap around one-handed and ends up pulling out a coil of wire.]

Ok, this might work better than sticky notes. What do you think? [He brings it over to the Doctor. It's very rusty.]