Well I'll tell you how I do it, others may have different methods....

I use two T-Pins on the larger hinges and this can work if there is a hole in the middle of the hinge, although none of the models I've used CA hinges on have that. I also open up a small area in the wood near the center of the hinge area on the fixed and movable surfaces to allow the CA to penetrate better. This can be done with a small drill bit.

Put the two pins in at the hinge center line where it will flex. Put the hinges into one or the other surface first (I prefer to do the fixed surface) then slide the moving surfact onto the hinges. The T-Pins will go right in the middle providing just a bit of clearance for control movement, as well as let you make sure the hinge is centered and straight.

Then I run the CA down the T-Pins to the hinges. This makes it easy to only run CA on the hinges and not get it all over the surfaces. I just run a couple of drops initially, when it soaks in I run a few more drops. Keep running CA a few drops at a time into the hinges until it no longer wicks into the hinge/wood. Grab the T-Pins with a pair of plyers, give 'em a quick twist and pull them out. If done before the CA sets up with that last application, it fills the holes created by the T-Pins and eliminates any raised area of CA that might have accumulated around the pins.

Let 'em dry good, give them a few flexes to get rid of that bit of surface CA at the flex point and make sure they work. Then you're ready to seal the hinge gaps.

Works for me....