On newer versions, standard spades will fit when entering from the top or bottom. Personally, I like the Harmonic Tech cables which can be ordered with locking bananas on the amp end. Their "Fantasy" uses 11g wire and is still fairly stiff, but the locking bananas make them much easier to work with. The larger 9g cable can also be ordered with them. You might check with Analysis Plus to see if they can re-terminate your existing cables.