2004 Box Van Fuel Filter Box

I feel pretty stupid asking this question, but I am trying to open the plastic box where (I presume) the fuel filter resides.
There are 2 'tabs' that I can get a screwdriver under, and lift a bit.
But I don't want to force it & end up breaking the tabs.
Searched online for a video showing how to do this, but came up empty!!
Can anyone link a video (or create one!), or just tell me what I need to do to open that darn box!!

Thanks.