loading loops

I m wandering what techniques yous use to build loading loads , as everytime i try i can get the track to meet or they end up a strange shape instead of an oval, i ve added 2 pics of ridley terminals unloading loop track as a rough idea of what i am trying to build and i have downloaded EMDSD90MAC's modern coal loader/silos how do i get this to load coal trains ???
i 'm still new to the route editor and still learning how to use the tools/assets within it
thanks