new peco 83 electrofrogs

ChooChoo Johnson
 

Peco DCC wiring experts,

Q1:  I have the newer PECO SL-E8361 electrofrogs.  I noticed the frog wire slots under the frog appears to be different that the one in Mr. Gartner's and many other video/pics on the internet.  I see many are routed in the slots, but is that really necessary, since current from that wire passes through the frog without having to loop it through the slots?
Q2:  What's the purpose of those slots anyway?

Thanks modelers.
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ChooChoo Johnson

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