Welcome to the forum.
If you go into this link
you will find instructions for using COM_NET
which will lead you into info for your 5th wheel, problems it may have had with TSB's, repair corrections for it also.
The large thread will have much more info on operation of your slides and keeping your batteries fully charged.
There is a 5th wheel group
not heard much anymore maybe you can revive them.
Enjoy the forum and safe travels.