Do not work the tree, remove wires or try to glue things. Plants can cover wounds. Every manipulaton now will increase the damage.
What type of wire did you use? It may have been a bit too thick. I like to use two thinner wires if not certain as it will, durong wiring, inflict less damage. Once you habe.more experience, you take the right size and type.
Do note that junipers are short lived indoors. But amazing views? Which city?