Wired & wireless compatability

I have purchased the items below, and i am trying to connect the existing wired  8 cameras to the hardware which comes with 4 wireless cameras. How can I add the existing cameras as the ports are limited to USB?

ANNKE 4K 16CH Wireless CCTV Camera System, 4pcs 2K Metal Security Camera Outdoor with Color Night Vision, 1TB HDD for 24/7 Recording, 5G & 2.4G WiFi, Two Way Audio, Human Detection, Alarm Lights, IP67