For starters, understand that the lifting platform is supposed to provide a solid, secure area for lifting - it is supposed to be capable of taking the pounding of heavy weights being dropped from arms' length overhead, day after day, and it needs to provide a sure-footed area for doing your lifts.
Class K welding cable is the most commonly used. Your standard welding cable is 30 AWG stranded and is available in a red or black jacket. Class K cable is commonly used for stationary welding jobs. Item (sold by the foot) O.D.
Eastwood's Spot Welding Kit for MIG welders includes a spot weld nozzle, spot weld clamping pliers and a 3/16 drill bit along with instructions. According to the supplied instructions, the kit will work with both 220v and 110v welders. However for the 110v welders, you have to drill a hole in the top piece of steel.