Buy a flat textile cable they are far better and longer lasting in my opinion. If the spool doesn't already have 2 opposing holes to attach it just drill the 2 holes to put a bolt through the drum to attach the cable to the drum. I have found the flat cable of woven material (like tow straps) much superior to steel cable on the boat winch. I'm sure others will pipe in with their opinions, but I much prefer that style. No rust, no frayed cable to stick into your hands. Lies on the drum perfectly when retrieved. Just make sure it is centered properly when run on the drum, so. it doesn't wear on the edges and it will last a long, long time.