how can i do a webhost seller

[Rynoxx]

Hi julinhobrow, to make things appear in WHMCS you have to manually create a "Server" in WHMCS entering all the details for your Sentora server and create the appropriate products for the plans you want to make.
WHMCS has a few handy videos for this on their support page: https://www.whmcs.com/support/video-tutorials/ I linked server & product/plans videos below, their documentation page also has these for text based tutorials: http://docs.whmcs.com/Getting_Started#Configuring_WHMCS

For servers
https://www.youtube.com/watch?v=7Mg6OMqJxps

For products/plans
https://www.youtube.com/watch?v=0lqzsTSUGw0