Just a stab in the dark, but perhaps the confusion is a case of dangling modifiers.
The "device" could be the OP's device (laptop, tablet, phone, etc), and the OP has normally used this device to automatically connect to a CoxWiFi. However, the CoxWiFi may actually be "not working."
Since the hotspot is offline, OP is asking how to connect this device to OP's "older pano modem" instead of automatically connecting to the CoxWiFi.
COULD Be, but the address provided is an apartment complex, so either they ARE trying to find a Cox Hotspot, or they are connecting to their pano modem, (BTW, the wpa/preshare key is posted on the bottom on the sticker if it IS your modem), and if it's someone else's wifi, then accessing it without their permission is a federal offense.
