Where do springs on skewer go? Where do the springs on a skewer go in relation to dropouts? And which way do they face?

My springs are conical but I can't recall which direction the cone pointed or if they were between hub and dropout or dropout and skewer end! Doh!

At the moment they are pointed out and between dropout and skewer end, but I need to fit a trailer hitch point.
From Sheldon Brown:



The lever goes on the non-drive side of the bike (i.e. the side without the gears). One spring should be on the non-drive side of the bike and the other spring should be on the drive side. The smaller ends of the springs should be pointing towards each other, towards the center of the skewer. 

Since you asked this, I strongly suggest you read the "Installing a quick-release wheel" of Sheldon Brown's page (linked above).