Quick GK cab help

[tb420]

I forgot my Speakon cable and I only have 1/4 jacks here at rehersal. Theres a spot on the back of the cab for a 1/4 jack but its covered by a but. I took the nut off but theres a bolt in there. How do I get it out?
Its a GK neo 115 btw.

Thanks TB

 

[tb420]

Figured it out.
I feel dumb.

Heres the manual, if anyone else needs help.

[Invalid or Expired Link Removed]

 

[cyndicate]

Did you use just your fingers? Mine seemed to be screwed on pretty tight to not use a tool

 

[B-string]

It has a plastic plug, a fingernail pulls it out.