There are several cables that the user will need to connect.
Use an Ethernet cable to connect the access point to the router. The cable should be inserted into a LAN port on the router and into the main Ethernet port on the access point. This introduces the access point to the routers created local area network.
Use an Ethernet cable to connect the router to the computer. The cable should be inserted into a LAN port on the router and into the Ethernet port on the computer (typically there is only one). This puts the computer onto the network and allows direct access point and LAN management.
If it is necessary to provide access to the Internet over the local area network, use an Ethernet cable to connect the router to the modem. Insert the cable into the main Ethernet port on the router and into the Ethernet port on the modem (typically there is only one).