Extending Pyrosetta toturials for docking by adding constraints

Hello,

I followed pyrosetta tutorials for docking.  I did something like the following:

scorefxn_low = create_score_function("interchain_cen")

jd = PyJobDistributor("output", 100, scorefxn_low)
while not jd.job_complete:
    cen_pose.assign(starting_cen_pose)
    dock_lowres.apply(cen_pose)
    jd.output_decoy(cen_pose)

 Then, I selected the candiddate with lowest score.

Now, my question is how can I add my own constraints (I have some constraints between CB of residues of chains A and B). I know how to add constraints, but I don't know which part of the above code (or code in toturial for docking) must be changeed in order to include my constraints.