if the bottom covers are still on, you should see the notch for the bottom pulley on the TDC marker of the cover. With that in place, the cam wheel should have the little dot on the top surface edge of the cam cover. The dizzy arm should line up with the notch in the dizzy body.
If not, remove the bottom covers and check the dot on the crank pulley lines up with the timing pulley.
If everything is lined up and dizzy is out, then twist it until it is in the right place.
Failing that, if it is close to starting, get a mate to crank it whilst you twist the dizzy (cap and leads all connected) both ways until it fires, then get your timing light out...