iPhone 6s Plus Belt Clip Case: LongRise Robost 4-Layer Heavy Duty Shockproof Defender Touch ID Case for iPhone 6 6S Plus 5.5 inch (Teal) Pull the rubber plug out; Take off the rubber piece; Install the Back PC Cover; Install the Font PC Cover; Make the plugs matched. Install the rubber back piece; Adjust all the plugs into all ports.