i have a broken rear derailleur (old sunlight u ) i don't know if it's short or medium cage , so im gonna replace it with a new one
all available derailleur which coming with hunger are too bad , and about 100% of them are short cage , i need to replace my broken one with a medium cage because i have loose chain with the old one and im gonna purchase a new 6-7 speed chain with the new derailleur , so .. i have an idea but don't know if it's possible or not , im thinking of buying a regular derailleur (without) hunger , and attach it in the old derailleur hanger , is this possible ?

this is my old broken derailleur with im thinking to use its hanger