Speedometer cable help

[RonBou]

Apparently the new speedo cable the previous owner installed was not tighten well enough. It has disconnected itself. :( My hands are way too big too reattach the cable by reaching in through the rear of the headlight assembly. Is there an easy way to get to it? Or...do I need to start dismantling the whole assembly? Can you get at it by removing the headlight? The book I have doesn't give me a clue and searching the posts here didn't get me any answers. Thanks in advance...