I've had my 88 gl1500 carbs out twice now.
The first time,I never said "you got to be kidding" so many times.
Here's a basic rundown,assuming that you are at least down to the top plate of the carb assembly.
1 Pull all the lower plastic off.Yes ,everything,the vent covers,reverse handle,all the way to the radiator grille.Needed to get to the screws and adjustments.
2.drain the radiator,there's coolant that goes to the bottom of the carbs.
3.from each side,you can get to the clamps that hold the carbs mounted in the rubber coupler.
4.mark or take pictures of the 4 vacuum lines that attach to the carbs on the left side.
5.there are hoses that attach under stuff as you may have seen.It's one of those times when you need a long pair of needle nose.
6.grab the carb assembly and pull back and up.This took quite an effort back and forth to dislodge them from the rubber coupler.
7.lift up the front of the carbs,pull loose the 2 coolant lines and the choke cable.
8 remove the throttle cable and follow the wire from the carb to the plug on the left side and unplug the cruise switch.
Sorry,this is getting long
9.lift the carbs up and pull the drain hose loose,they should lift out.
Now this is basic,so I expect you can handle any different things that pop up.
The first time I pulled my carbs,from start it took a little over 4 hours.