wiring question

On the 62 classic , I am near ready to run it...however...a couple wires have me scratching my head a little.

Wirng back at the coil...(312 egine)
First of all...there is no bal/res and my wiring diagram from the shop manual shows none if an alternator is used(which mine does) ...if a generator is used it shows a bal/res before the coil. If there is no bal/res... can I still use the standard coil that I would use on my other70's boats ???
(302,351)

Also...wires??? All at the rear near the coi1(On the 312 coil is at the back of engine as is the distr.)

1.Purple from ign to the coil...got that.
2.Orange??? It only reaches to the batt connection at the starter...does that sound right?
3.white...should be grd...it was grounded to the block before.
4.Yellow...??? I think it was grounded but not sure??? It looks like it was grounded near the coil , unless it was on the coil??? I traced it back derectly to the keyed ign. switch.

There is no nuetral safety switch or starter button.

So...those four wires???! and should there be a bal/res.???

Thanks

Thanks David F ! It's all good now! Yellow needed to go to the pos side at the coil.

And then could not get it to fire until my nieghbor shows up...distr. was 180 deg backwards...fixed that and it fired right up and roared! Got to hear that 312 for the first time! It will see the water this week!