Hmmm, no idea - never seen a docking connector getting stuck, they have a very low-effort dock/undock. The only way to really test this would be to remove the docking connector from the sled and try docking/undocking by hand.

The connector on the empeg end should be "loose" (ie, it should wiggle about a bit - the screws are only partially threaded to allow it to self-align). Does it?

Hugo