answered:
Most likely you don’t! I would put it somewhere sheltered outside and let nature take its course. It can be upsetting to see but it’s perfectly natural for any wild animals including bugs to be injured and in general I don’t think we should interfere unless the injury was caused by humans. With bugs though there isn’t usually much you can do unless you’re planning on providing food and shelter until it molts enough to repair damage. Wings though cannot be repaired naturally.