I have hot-melt glued an empty small glue bottle, (such as the Tamiya glue bottle) on a large wooden disk, at a slight angle.
I added some tube to hold some brushes.
Then decant some EMA into the bottle, over the SINK! not the model bench, guess why!
I use time-expired natural hair brushes (not nylon they will melt) or cheapo ones from $/£-shop to apply the liquid glue.
Others still use the applicator brush as in the lid of the bottle, some cut down the number of bristles to get a more precise applicator.
The brush will stiffen, from melted plastic, but you can rinse with EMA & work out the brush on your clean-up rag or tissue.