I built a long rod with a washer at one end that went up against the steps. At the other end, the rod went through the step holding framework. The rod had a hole in it that I would put a push through clip through on the other side of the frame.
Mike
2012 Winnebago Impulse Silver 26QP
2005 16.6 Double Eagle
2018 Jeep Wrangler JK
previously Snowbird Campers,
Triple E Motorhome and Fifth Wheel