When I first clipped the extension module in place, I was a little surprised that I got reliable power simply through the rail joiners connecting the module to the main layout. I left things that way for a while, but I wouldn’t call it a best practice standard. As with all turnouts, the frog is dead. That being the case, I was getting stalling when the short wheelbase switcher passed the turnout.
Time to do things correctly. I powered the frog with a Tam Valley Frog juicer and added two sets of 18-gauge feeders. Stranded vs. solid doesn’t matter. The photo above shows the location of the feeders, which I soldered to the bottom of the rail. The Walthers c70 turnouts have a tab for wiring in a power feed.
Here’s a view from the bottom showing the juicer. The module connects to the main layout bus via an XT60, 14-gauge quick-disconnect plug purchased on Amazon.