Turn signal cancelling cam help

[landy]

I bought a cancelling cam and horn contact kit from LMC for a '72, but the cam looks different than in the LMC catalog parts diagram. According to the diagram, the cam should have a little slot near the top that keeps the horn contact pin in place with the aid of a sleeve (don't know the correct name of the sleeve part) that locks into the slot. Also, the diagram shows the larger end of the contact pin going into the cam head first, but on mine the pin head is too large. My repair manual doesn't have any detailed pics. Anybody else had this problem? Maybe LMC sent me the wrong part?

Here's a link to the parts in question (#9 and #11).

http://www.lmctruck.com/icatalog/cb/full.aspx?Page=127

Thanks!