I have a F250 with a backseat, backseat removed and carpeted plywood mounted to the floor and back wall. I attached mine to the back wall. I think that's where most mount them. I have always told my guys the hose is their other eyewash station. I use the "Y" shut-off on the end of the hose with the witches hat on one and the other open. They can wash their eyes with the open end.