I don't think you'll have much of an issue either way, though I think you'd have better off with a set like these than the ones you chose:

To properly use the ones you purchased, normally you'd clip off the connectors at the end of the wires, then bare the wires (remove the insulation) about a 1/2" back, then put the bare wires under the clamp, holding them there until you get the clamps (metal part where you are attaching the wires at now, not the part which holds the battery terminal) snugged down.
Either way, if you coat the terminal area and clamps (all exposed metal) in a thin layer of grease, you'll find you won't have as much corrosion buildup over time.