I cannot find the option anywhere, i was offered to install them last night after finishing downloading BF4, but i rejected, intending to play a few matches before going to sleep.
Can't find the option to add the DLCs, where can i manage that? Or is it a problem with Origin?
And no, the regedit won't work since i don't have them even downloaded, i just dunno what to do.
Did you looked under the "Extra content" tab at the BF4 game library page?