BTW. You didn't say if your toddler was ticketed. Seat or not, it's required. See the following quote from CO's web site:

"Infants traveling within the 50 U.S. do not require a ticket. All infants traveling internationally must have a ticket, even if no seat is purchased.

Infants traveling to Canada, Mexico and some destinations in the Caribbean only pay taxes on the ticket. Infants traveling to other international destinations are charged 10 percent of the adult fare."

And I believe that the bassinet attachment points are basically just small holes with a fitting in the bulkheak. They take a pair of rods extending from the bassinet which are kept in storage somewhere on the plane.