We purchased our 2016 Precept 31UL last October. I read the manual and realized that there should be gas struts under our bed as stated in the 2016 Precept manual, Section 12: Interior, Bed Storage. Instead, we have a 'bar' which is attached to the interior wall of the under bed storage which one would pull out and 'hook' into a metal hole which is attached to the bed lid (cover). (It reminds me of the same rod & hole under the hood of a car.)
We contacted Jayco and was told that not all Precept beds have the struts because of the way the bed is constructed and positioned i.e. facing front or facing sideways. Our MH could not have struts because the bed faces sideways. When our slide goes in and out, only the top of the bed moves. The bottom, or box, of the bed remains stationary. We had to go back to our MH to actually see what the Jayco rep was talking about and sure enough, our MH would not be able to use gas struts.
Hope that helps.