Hi guys, while moving house my friend removed my rear wheel and it seems I'm in a little bit of a mess. I'm a complete beginner, so bare with me! He removed the wheel and I've no idea of what gear it was in. I'm managed to reattach it, but my gear cable is loose and I'm not sure how to best fix it. Should I put the bike in the lowest/highest gear and put it in the smallest/largest cogs? Any help (in very simple to follow instructions) would be really appreciated!