[Mikendebbie]

I found a sales video that shows the board in question…I think…see screen shot below. That is part of the cabinet face frame. If it was mine - I would cut that piece out (straight down at both edges) and set it aside. To put it back - I would add a 1x2 to the back side along the bottom - so you have an “L” shape assembly. Pre-drill the 1x2 for 3 screw holes. I would slide the piece back into place and anchor the 1x2 to the floor. This piece will be removable for the next time you need access.