Need help with Itunes

[LLLady]

I just got a new Imac and I want to put my itunes library into this new mac
but I can't figure out how ...... I have it saved on a external back up ????
My other Imac just stopped working it was 5 years old so I can't get it from there

thank you

 

[MSTRKRFT]

I just got a new Imac and I want to put my itunes library into this new mac
but I can't figure out how ...... I have it saved on a external back up ????
My other Imac just stopped working it was 5 years old so I can't get it from there

thank you

File>Add to Library