Hello again.
I looked into this some more, and I got it working!
Here's how:
I created a file called connman-service.config under /storage/.cache/connman
In that file I put this information (for PEAP logon onto a WPA2 Enterprise network):
[service_name] - Must be unique for each SSID you have on your network
Type = wifi
Name = name_of_SSID
EAP = peap
Phase2 = MSCHAPV2
Identity = username
Passphrase = password
I rebooted, and voila! It works!
One question, though: Is it possible to encrypt the password with MD5 or something? For security reasons..
Thanks again.