M8493 Power Mac G4 QuickSilver Front Panel Control Cable $10.00 For power switch M8493 Power Mac G4 QuickSilver Front Panel Control Cable quantity Add to cart Add to Quote Continue Shopping Category: M8493 Power Mac G4 Quicksilver Description Front Panel Cable or control panel cable for the Apple Power Mac G4 QuickSilver Models. Apple 922-4561, 590-5056.