So you received the ST48, which is a 4 gauge cable inlet with a #8 spade connection. That is designed to fit 4 gauge cable to any amp with a #8 barrier strip connection. Before amps came with direct connection points, they used barrier or screw strips. These most often only worked up to 8 gauge cable. We solved that problem with that terminal, thus you can fit 4 gauge where only 8 gauge would fit before:Either knu sent me out 8 gauge spade terminals, or you guys make them weird. There were the same size as an 8 gauge spade terminal but the 4 gauge fit in. Non the less I have 4 and 1/0 gauge kolossus cable and it is pretty nice cable.