Justin- I'm certainly no expert, but if it were me I would just reach in along the bottom and gently pull the jar away from the cluster.
How did you put your Queen in? Is she in the cage still or did you direct release? If she's still in the cage, you can probably wait until you release her. But they can build comb quickly and will do crazy things when they get to the jar, so sooner is better than later.
Once the jar is out of the cluster you can just move it to the other side of the nest cavity, the bees will go back to the cluster on their own. Then, once they are settled into their new home and building comb (within a week), put the feeder on the other side of the follower board. The other side of the follower works well for me. I have, and you will need, a 1" hole at the bottom of my follower board that the bees go through to get to the feeder. I can access the feeder without ever opening the nest area.
Bees are so forgiving its crazy. Mine are still thriving through all my blunders.
Jen