They are still threaded, but Fly High will put a PVC pipe glue on them to keep them there forever. A little heat and some patience will get them out. Also, I am guessing that the sacs that you have are the semi-custom x2 kits? Those come with only those parts for the fully automated setup. MasterCraft makes a cap for the 3/4" fittings (they are used when you pull a sac out on a 197 and cap the fill and drain lines to prevent you from bumping the switch and filling the boat), but there isnt anything for the 1". Flow-Rite is the place that makes them all of those quick connects. I have to believe that they make that part. I couldnt find it on their site, but give them a call if that is what you are looking for -
(USA - Marine products)
(615) 443-0264 (phone/fax)
I hope this helps!
John www.waterskis.com email@example.com