Was already saving presets for the other characters and they worked fine, but I'll give your suggestion a try for Zelda. Not sure what you mean by "connect to a slider" though.
Got the hair loading on my side.
1. Have both Plugins (manager and superglue) set to automatically load with every session.
- Load both to "session plugins"
- Save "session plugin preset"
2. And have created a Preset for the character.
- Name -> check selected asset -> Save linked attom preset"
After this, you can scroll down to this section:
This will allow the preset to automatically load every time the character does, as loading the character will use the ZELDA morph slider and trigger this plugin loading her hair.