Please configure the JMS listener if you are deploying war file or MDB listener if you are deploying ear file in weblogic server. Please import the MQ jars in pega application using import wizard and configure the queue details in listener and try to consume the messages. Please let us know if you are facing any issue with this approach.
But for creating JMS listener we need to set up the connection factories in weblogic, which will have to details of MQ Queue Manager, MQ Channel. Do you have any idea on how to configure it in weblogic?