[rpcameron]

On Android you shouldn't need to - you should find them in the add-ons manager under Add-ons/My add-ons/PVR clients.

Initially they are all installed but disabled, you should just need to enable whichever one you need.

Im experiencing the same issue. 

Add-ons/My add-ons/PVR clients  -> this submenu does not show

there is no way i can add a pvr client...

Add-ons/ PVR client = EMPTY and only shows [..] as option to go back on directory, and it should show a list of PVR's

If you're on Android and you don't have PVR clients installed, you most likely do not have an official distribution of Kodi. (Did you perhaps buy a "fully loaded" device filled with addons and links to less-than-fully-legal content?) Download an official release and re-install. Same goes for Windows or Mac.

If you're on Linux, you need to either build them from source or get them from your OS's repositories.