Boot Cable Seized

Any advice for free-ing up a seized boot cable? Have removed the arch liner and opened the boot using the old broom handle trick! Unclipped it at the boot end & run some penetrating oil down it as best I can so far. How does it unclip from the driver's seat end? Presumably thats' necessary to try and work it back and forth a bit if possible?

Anyone got a photo of how it's attached this end or tips?

Hopefully not a plastic side-sill off job. The handle just won't budge when I pull it upwards... Thanks

it's a git to change the cable because it goes over the fuel tank, zero access.

 

Keep trying the penetrating oil and hopefully it will free up eventually