XMp3i

1st this is a portable Sat reciver that can be docked anywhere. I use it in Car, Truck, & Boat. I can only hear it at one location. Only want to pay XM/Serius one subscription. Just bought 11 #3 with free 90 day XM. Will factory attenna fit XMp3i input? Last Seriius docking Sportster I had broke and I could not get a new one or get it fixed. My docking hardware for Sportster is now worthless. XM/Seriius wants to end docking program and sell more subscriptions.