If I remember correctly (doubtful) brown to the right and green to the left. It's easy enough to just hook one up temporarily and see which side sound comes from.... that's what I did. Now if I could just get that darn power antenna to work (don't know what wire for it)! Probably about the worst you could do is blow the fuse so just make sure you have a few extras before you start. A voltage tester will show you which other wires to use.

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k