clutch rebuild question

So, i'm doing my spring cleaning setup on my 00 r1, replaced the cam chain tensioner, and now i'm doing the clutch. need to replace the clutch boss, but I can't get the nut to break loose with a bar. Going to try a big impact gun next. My question is this: when I was taking the old discs out, there was a wire wrapping around the boss holding the innermost discs in place, is it imperative to put that wire back on when I reassemble? cuz I think I lost it...