This was a recent question... and the answer is... use the Chinit //CSQINPX datasset. This is similar to the queue manager //CSQINP2.
You can put other commands like start listener in this data set.
Or - thanks to the hint from Norbert Pfister
START TRACE(A) CLASS(4)
START TRACE(S) CLASS(4)
before your start the CHINIT.