I've probably seen a hundred of these keyboards, but only one with this alloy cable lock. It's an Apple branded part with the pre-Mac Motter Tektura font. Any Apple /// people know if this fit somewhere on its case? The plastic curls around the part inside and it's impossible to remove without breaking plastic.

I was going to make a keychain out of it, but my keys are swollen enough as it is - thought someone might like to see it before it is cast away on eBay.