Not sure which one....whatever came with it when i bought it new from cabelas 2 years ago. Its mounted left of the motor. Would u like a pic of it? I just ordered a 998c si from bbg marine so if i can hopefully get this fixed ill move it up front. I have a terrova us2 up front and have a cheap pirannah linked to it. If i move this one up front and link it up the down imaging wont work for it right? This technology is crazy to figure out lol