Cam Shasft Sproket Keyway??

Ok, I replaced my Cam seals, Crank Seal, O-ring and water pump, but now in reassembling I have stumbled on the Cam Shaft Sprocket going back on.

Do the Cam shaft sprockets have keyways. Niether one had them when I took them off. The Cank Sprocket did of course, but what the hell did I miss on the cam's.

They have a weight in them but surely that does not go in the groove?

I looked on Subaruparts.com and they do not show a keyway either.

Please someone help!!!