I have an Epiphone guitar and my friend is selling a set of Seymour Duncan APH-2S Slash Alnico II Pro Set R.Zebra , so i said i might buy them if they sound good on my Epiphone, well i know how to solider that is not a problem but i just want to make sure all the wiring is ok or if i need to changing anything before installing the pick ups , not sure what all that silver is inside it was like that when i opened it .