The two conductors in the wire are insulated separately and sort of lightly attached so it's probably OK if done carefully. If this was me, I would've threaded

The two conductors in the wire are insulated separately and sort of lightly attached so it's probably OK if done carefully. If this was me, I would've threaded the lights through the big triangle piece directly and attached with zip ties, instead of modifying the cord. > Also, the comment at the end to use "hooks" beats the whole point of using magnets. Installing a nondescript hook up there would be a one-time use of a ladder which could just be borrowed or rented from somewhere. Future decorations can be done with just the extending pole and magnetic attachment.