I have a 2005 E85 non nav and backup sensors. I am looking into possible installing a after market backup camera in my car. Doing a search it appears there are two options. Hardwired and wireless. Both suggest taping into the backup lights. Has anyone done this and if so how did you tap into the backup lights? Seems you have to drill a hole into the bumper to attach camera into them? Don't really fancy about drilling holes but possible other options?