Let's see if this helps.

If you scroll about half way down this page:
http://www.modeltrainguide.com/index.php?mode=displayarticle&section=5&article=4
you should see a section about Reversing Loops, with a sketch.

The idea is to treat each switch not as Forward/Reverse, but timetable direction, say Eastbound/Westbound.  Switch B for the reversing loop may not be needed if you will only run the trains one way through the loop.  It is the mainline section, controlled by Switch A, that has a change of direction and must be switched.

Although I would disagree about wiring as shown in that linked drawing.  I think it would be better to feed the mainline through the reversing switch, as it is the mainline that is changing directions.  the train enters the loop, and you then operate the DPDT switch, which would then allow the train to smoothly leave the loop and enter the main.

I think the connector tab for the base looked to be approximately in line with the rail.  But I suppose the wire could have been routed towards the center of the rails, and a notch made there.

For some of my yard tracks, I have soldered directly to the end of the bumper track piece, hiding the wire with landscaping material.

For the mainline, I have soldered the wire to the underside of the rail joiner.  The wire then goes between the EZTrack pieces.  Some creativity was needed, as the two base pieces pinch the wire.
I was generally successful in removing the joiner, and doing the soldering away from the actual track.