I am setting up a track of medium length and felt a power booster would be helpful.  I have connected it to the Controller system .  I now need to connect the wire from the booster to the track.  Is this soldered directly to the track or connected to a red power wire that plugs into the rerailer?  Previously I had power connections every 6 to 10 feet of track, is the necessary with the power booster?  There is no accessory outlet on the system so I presume I need a separate transformer for this function.  Thanks for any help.