In the proxies section, you can add your own proxy by clicking on the Add proxy button, there you have to enter the following details.
1. Name
2. Host
3. Port
4. IP URL
5. Username
6. Password
7. Bypass list
8. Geo
9. Cert
Once you enter all of the above details that are required to load the proxy then you can simply click on save and your proxy will be added inside FBAS.