Where can I find the class in which the job configurations are set in a job jar file produced by pig?

Hello,

I am trying to find the class which contains the job configuration part in
a job file produced by pig.

In detail, for example, I run a PigMix query. As you know, when I run pig
script, it produces job jar file in tmp directory. I stored that job jar
file separately to figure out what kind of MapReduce job is really produced
by pig. But it is hard for me to find the class which has the job
configuration part from the job jar file. What I want to ask is this: where
can I find the class in which the job configurations are set in that job
jar file? Or, is there any other better way to see the real MapReduce job
produced by pig?

Thank you in advance.

Best Regards,