The associativity of "Level 2" should be with "MQSeries" and not with "queue manager". Note that the additional caveat "except WebSphere MQ for z/OS," is spe ...
Can you tell us in what context you've seen this phrase?
I was browsing through the mq admin course for windows when i met this term. URL here:
http://www-304.ibm.com/jct03001c/services/learning/ ...