What size spades for EAD Powermaster 1000

Could someone who owns the EAD Powermaster 1000 please let me know what size spades on the speaker cables should I be using? 5/16" or 1/4"

I bought some cables that have spades that will fit both. I have seen several spades that would do the trick. That way if you ever try something other then the EAD, you can use the same cables.