Longi Solar Panel disconnect

[sumya]

Hello, I am trying out few options and got these Longi 400W panels.
I am not able to figure out how to disconnect the -ve black cable coming out of solar panel which connects to male connector.
Disconnect tool that I ordered from amazon is not working. Is there a proprietary disconnect tool for this panel?
See pic for more details

 

[AntronX]

Cut that cover off using boxcutter knife.

 

[Brucey]

two small screwdrivers should do it.

 

[Q-Dog]

 

[sumya]

Thank you guys. It worked.
Will add a zip tie till I am done with experiments.