The chord bar holder on a vintage late 1960s or 70s 21 bar Chromaharp is made of hard plastic but I do not know which type. I need to glue three fragments of the foot of one of two chord bar holders back onto the main and need to know which type of glue is best. Any ideas?

https://www.creativemechanisms.com/blog/eleven-most-important-plastics



https://m.wikihow.com/Glue-Plastic