How to get USB debugging on ZTE Z233VL?

I've been trying to get USB debugging on the ZTE Z233VL, to possibly install apps. The issue is that I've been trying to look up "Where does Android keep the configuration on if USB debugging is enabled", and all it tells me is how to enable USB debugging on every Android device but this one. Most of the Android test codes don't work, no debugging features work, and the APK package installer app (the GUI for the installer, not the "pm" tool) isn't bundled. It shows the icon for the app, but it doesn't have a program to run it, it says. Also, it has no WiFi.