http://personalpages.tds.net/~wilykat/nes-fc.html (honest, this is not a hidden perverted link! May God strike and destroy my rarest of the rare game cart if I'm lying!)
Just the pinout diagram. It's mostly straightforward when connecting FC 60 pin connector to NES' 72 pin connector.
I'll probably blow one of my gabillion NES decks and see if I can make a working proto dual slot NES to eliminate the need of adapters and to make it so the 72 pin connector won't go blink-blink like the classic front loading deck always do. Killing 2 birds with one stone's always fun.
Now where did I leave those pile of leftover IDE cables... I sure could use instant wire collections for the connector connection. ...ah yes, found 'em. About 20 of the obsolete 40 conductor cables (I wouldn't cut up an 80 conductor, they're like $20 just for a short one :P)