No questions are dumb,,
Wire twist clamp is just using plain old soft iron wire (black iron wire. Usually buy it on a plastic spool in the HomeDepot type stores. Very soft and flexible. Comes in handy for a lot of shop work.
Wrap at least 2 winds around the bbls and twist the ends together as tight as you need with a pliers.
If you want, you can slip thin pieces of brass shim stock betw the wire and the bbl surface to be sure. I've even used aluminum foil and that works OK. You are only going to around 450F in soldering so nothings going to melt or stain the blue.
You can additionally add a kink to the loop of wire where ever you can get ahold of it with a pliers and not mar the bbl finsh.
That kink will pull the loop a little tighter and tighten the clamp effect.

Heat source is just a common hand held propane torch. Mine has the Pencil type flame on it and I seem to leave it that way and it works fine. I like things simple.

(I relay ribs using that torch and flame style. I do the tinning using an old large size electic soldering copper. Quick and clean.)

Keep the flame moving and don't over heat any particular spot wishing for the solder to melt quicker.
Gently bring the entire area up to the required temp which will only be around 450F. You'll see the solder melt in the joint betw the ribs and bbl.
Shake the bbls a bit to make sure those loose ones get melted and sucked into the solder joints inside.
Should take care of it.

Don't be in a hurry,,there's no race to get it done. It's only solder being melted and everything,,ribs and bbls are secured in their positions. Nothings going to fly apart.
You can work that over all afternoon as long as you don't overheat the solder and the joint.
It will just rejoin and solder itself back together when it cools off again.

Don't play the flame of the torch on those simple wire twist clamps. The wires will heat up near instantly like a stove element to bright red.
The wire elongates in that extreme heat and relaxes,,there goes your clamp effect.

You can use a hose clamp. They work very well as far as doing what they are intended to do,,clamp things..
I have used them on occasion but never really liked them personally. They scratch things up easily if you are working on a finished product such as this.
They just seem to be a juggling act in my hands as opposed to simple C clamps and wire which I use all the time.

Some use a fixture to hold the bbls and ribs with clamping devises built in. Beautiful apparatus but I've always just used a basket of C clamps, some wire and the bbls held horizontal in the vise on a wooded peg jammed into one of the chambers.

What ever works for you and gets you the results you desire,,That is what's best,,for you.