wire for frog on e-z track #5 Turnouts

[raptor106]

hi
i have thouse bachmann e-z #5 Turnout on my layout and they all work good. but when i look under there a wire that suppost to connect to the frog. i don't have manual for it anymore but just wondering what dose it do? 

[Doneldon]

rap-

You use that wire when you want to electrify the frog so it has
the same polarity as the stock rail to which it leads.
                                                                               -- D

[Jerrys HO]

rap
Doneldon continued...........
Which in turn will let shorter wheel base loco's run without stalling or hesitating on the frog.
Personally I use the #5's and have not powered any of them to date. All my loco's run just fine through them.

Jerry