Ah, I see! The original kit was moulded with the cut-out, and a separate 'civilian' tail cone. I don't think I've got any pics of the tow-hook attachment, but I'll have a look. It was basically a hook-like hitch, with a locking arm that opened to take the ring of the tow rope. The main part of the assembly was inside the tail, out of sight. In 1/72nd scale, a simple loop would look good enough, after blanking-off the tail.