When reattaching the home button bracket, I’ve found it works well to clean the old adhesive from the bracket, then apply a small amount of Goop (soft cure adhesive) to each tab, then use binder clips (paper clips for multiple sheets) to hold the two bracket tabs firmly in place while the glue sets over several hours. By using the binder clips, you can jockey the bracket around to perfectly align the actuator tip over the home button clicker before glue sets.