With a "kit" the panels are already wired to the controller's array side, so all you can do is connect the controller's battery side to the battery. This should not fry that controller.
Some controllers, not all, will go bad if you do not follow the proper sequence in their user manuals--connect battery first then array, and VV when disconnecting.
Must be something else the matter. Take it all apart and check each panel aimed at the sun using your DMM to make sure each one is ok (see their Isc and Voc specs), then re-assemble and try again.