I have a few pieces of 6-12073 and they have a center pin on each end and a wire under the track , looking today and the track on the Lionel page does not have the center pin can not see the bottom so don't know about a wire. If the track has the center pins do you remove the wire to isolate a section, understand there will be a 6-12063 at the end of the section .
Thanks
Brent