Best way to use motor 6d to weld stuff to the player

ok soo im planning to attach weapons to character back and hand, whats the best way to store all the weapon models in a folder with their respective offset and the best way to change that offset, i had a script in which i would position the sword in a dummy and weld it with a plugin and copy the motor6d to the model in the folder but it was really hacky to do that and im trying to see if i can find a more customizeable way of doing it, plz help