Designer's Note
WARNING: This part is simple but actually somewhat hard to use. It is a simple plate with a thin rubberized cover on the top side. When you turn it over there are a number of knockouts etc for screws. You may want to carefully drill the ones out you want to use so you can get them to line up with your junction box.
One more thing, it does not come with any screws, for some reason the factory never included them. Just plain dumb. You will have to use the screws that came with your junction box. We do not stock a white or black screw that will work.
Consider this option, as an example, of two 4' tracks and the junction box is in the middle. You would think that a straight connector TLSK136 and this cover TLSK113 would do the trick. But I would strongly suggest you allow the track to be slightly off center and use either two tracks, a mini joiner TLSK107 and a floating canopy TLSK103. Or one 8' track and a floating canopy connector. (there is a minimum order on 8' track due to shipping issues on long boxes) Track does not always have to be perfectly centered, the track heads are adjustable and you will get the light where you nee