Got this Nexus 3 speed with Alex Xrims 303 front and rear aluminum wheels. Looks like this right now (no mounting hardware, cog or shift mechanism.). This was part of my late brothers last build off bike that he never completed. I have never worked with a Nexus 3. Usually I get my parts by dismantling complete bikes so small parts come along with. Wondering if everyone buys these wheel assemblies like this and then buys the parts to complete installation separate or were the rest of the parts shipped with the wheels in a box somewhere? Also, not is there no cog, there is no snap ring either.