One wire alternator conversion- best method to run the thick power wire

KitCarlson said
The battery is what filters rectified 3 phase output of alternator. If you go remote from battery, a whine that increases in frequency, may interfere with other electronics, along with sensing and regulation issues indicated above.

Can you explain that?
Its just hard to grasp how normal noise and ripple around 14 volts is reduced when a junction with the battery is introduced.