The present disclosure relates to a cluster connector assembly, wherein the cluster connector assembly comprises: a plurality of connectors with cables; a front case configured to integrate the connectors together; a locking assembly which can axially locks the connectors in the front case independently of each other; and a rear case which can be connected to the front case to fix the locking assembly. The cluster connector assembly is advantageous in that, each connector may be locked by a locking sleeve assigned uniquely for it, whereby the respective connectors can be locked reliably independent of each other. The present disclosure further relates to a method for mounting the cluster connector assembly.