You simply thread your wick through the existing coil.
It's a lengthy thread but might want to read http://www.e-cigarette-forum.com/forum/rebuildable-atomizer-systems/416271-micro-coils-increase-vapor-flavor-th.html
It's a lengthy thread but might want to read http://www.e-cigarette-forum.com/forum/rebuildable-atomizer-systems/416271-micro-coils-increase-vapor-flavor-th.html