Coil Connector

[watson333]

Hi,I am a first time poster and a first time Triton owner so this is a real newbie question.
ML Triton 2WD 2351cc 4G64 Motor
I want to replace spark plugs with decent iridium plugs but how to remove coil connector so I can withdraw tube and coil.
Please

Problem solved I just wasnt being aggressive enough.