snapped speedo cable Disco 1

I was reading some other posts, and wondered if anyone has had a snapped speedo cable right at the transfer box. Ours has snapped and left the metal rod like thing from the end of the cable still sitting in the transfer box. It looks like there might be a threaded something that it is sitting in, are we right? Any ideas on how to get the broken end out? Such a small space to work in, and don't want to start dismantling the whole lot to get it out. So far we have managed to find law abiding citizens to drive behind for the ridiculous 20mph speed limits here.

Points 2 and 3 in the speedo drive removal tutorial here: https://www.land-rover-blog.co.uk/how-to-replace-the-speedo-drive-gear-on-a-land-rover/