If you want to send a profile to the FOH and with a cab at the same time:
- Connect your Main Out to the FOH.
- Use the Monitor Output and connect it to your cabinet on stage.
- Go the global Output Settings and use the Softbutton "Monitor Cab Off" (https://i.ytimg.com/vi/qiqz-6dVKi0/maxresdefault.jpg)
This means: Your complete profile will be used for the Main Output, the cabinet get's the same profile but without the cabinet section.
You will get the best results with "merged Profiles", but also "studio profiles" can sound great.
If you have a "direct Profile" only, you can add a cabinet. Click and hold the white Cabinet button then use the Browse dial to cycle through the cabs of your KPA (or use the Rig Manager for this. You can also do this with any other profiles or course.
You can also find this in the Main Manual (English version, 8.5) . Have a look at page 86 (and ongoing). https://www.kemper-amps.com/downloads/5/User-Manuals
P.S.: What profiler do you use? If you don't have a version with the built in power amp ("unpowered") you need a power amp between your profiler and your cabinet.