No. you cannot specify the load library in the program.
Regarding the JCL, you may not have access to it, but what you can do is go to SDSF (or it's equivalent in your installation), type PRE "CICSREGI", where CICSREGI is the name of your region, hit enter and then type the command OWNER * and hit enter again. You will see a job running with the name of your CICS region. You can see the JCL over here.