Thanks so much for answer MrC there is no slot on outside on bottom. I thought I was going crazy by not finding. Controller was also set on CS and I read I believe in manual that controller was set by default to FCC, so I am thinking this was a return and then sent back out again. I got it at Amazon sold by Amazon and not a third party. I wonder why I was sent an old one and does it matter, it kinda seems like it does, I do not want open up controller to access port. Do you know how old is old and when new ones came out with port on bottom, thanks for help