I can, I spent 2 hours trying to either connect to the shuttle or getting thrown off the deck (not clear when connected to shuttle).
What I did
I would approach the shuttle and lower the launch bar just behind or on top of it.
I would press 'U' to connect - this did not happen every time. On a couple of occasions the shuttle would move forward slightly to connect with the launch bar.
After asked for ATC approval to take off - the blast shield would raise when permission given. If I thought I was connected to the catapult, I pushed the throttles to full, and the aircraft would take off as if it was on a normal runway (no catapult).
or if I was unsure, i would press the 'U' key and the aircraft would be thrown across the deck like a rag doll, on one occasion it was over the side. This only occurred at catapult 3.