ok, first things first, fix that 'input jack' thing before Line6man shows up and write:
it's
Output Jack
Haha, nothing personal L6!


An output jack it's about 3$ on the expensive side, on the cheap side 1,50$ buy a switchcraft and solder the lead and ground.. it's not that hard..
Take a look on the old jack and see which cables goes to which lug.. that's it.. solder them.. and enjoy...