Ignition help - no spark

I have a new battery (And everything else!) But still nothing. The only spark I got was a yellow spark as I turned off the key. Starter sound bad, so it may be partial problem.
Two things I noticed... 1 a lot of play in distributor where ignition pickup sets, making it hard to adjust air gap (when tooth goes nr pickup the magnet pulls it againt it. And 2 on the back of alternator there are 2 wires marked fld. Does it matter whch wire goes where? One has voltage. Thanks for any help or suggestions, I'm about ready to dump this car out of frustration.