2001 Artic Cat No Start??

Fellow Snowmobilers, I have a 2001 Artic Cat Pantera 580 EFI 2-up. Will not start, no electric? Have hot battery hooked up nothing when key is turned to start. When I put a positive jumper cable from a different battery to starter post it turned over and started, ran great. Still nothing with installed battery, Any help is deeply appreciated. Thanks

2001 Artic Cat No Start??