I bought a 1989 90 a few years ago which had a after market third party steering wheel. I am trying to fit an original LR steering wheel which I bought off eBay. I've searched countless forum messages on the subject and can only conclude that the previous owner has removed the orginal boss (or whatever it is called) and all the forum entries I can find are about how to fit a nonLR steering wheel rather than putting an original one back on. When I have removed the after market steering wheel there is just a flat bolt on the end (see picture). Help please!