Your self-installation kit will contain a Spectrum modem, WiFi router, Ethernet cable, two coaxial cables, coax splitter, and step-by-step instructions. Before you start, you'll need access to your coaxial cable outlet, usually located in a common area like a living. A splitter is a device used to split a cable signal between two or more devices. The splitter should only be used if the outlet will be. 📺 Step-by-step guide to connect your Spectrum cable box and internet for seamless streaming. You don't have to go through the hassle of scheduling an appointment to get your new Spectrum service installed. We also provide detailed instructions for completing a self-install and getting ready for a.