Are you trying to retrieve the values? E.g.,
vars = Catenate@Array[c, {6, 6}, {-3, -3}] (* your "variables" *) rules = Thread[Rule[vars, RandomReal[{0, 1}, 36]]] (* example rules *) vars /. rules (* retrieve values *) Or did you want to make some kinds of assignments? (If so, which?) For example, if you really (are you sure?) need all those rules to become assignments, you could
rules /. {Rule -> Set}