There are three separate hides, in different parts of the tank. When I introduced them, they spread out to the other hides, each claiming their own. Over the first few days they migrated into the one.
They did heavy excavating, because for three days, their water dish (which is about six inches from that hide) became fouled with substrate that I had to change ti daily.
As for coaxing them out, I cannot. Not without destroying the hide. I'll try to get some pictures after work.