Stop using that cable lock now. Get yourself a quality dual-shackle u-lock. Do not lock the bike up anywhere with that cable lock. USe it for your wheels only!
Popular alternatives to
ABUS 410 Ultra U Lock
Kryptonite KryptoLok Series 2 Standard Heavy Duty Bicycle U Lock with 4ft Flex Bike Cable
Kryptonite Evolution Mini-7 Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys