Need a bit more info on your storage doors. Are your doors flip up (i.e.- hinged at the top)? Also, do they have the "slam lock" latches (drop the door from a few inches and it latches)?
If these are the doors/latches you have on your RV, you need to use a good silicone and seal the screws and under the portion of the latch that's mounted to the door frame. Also, if the gasket around the door frame has a gasket that's installed so that the gasket ends come together on the bottom of the door frame, you'll need to seal that joint also. If your doors/hinges are a different configuration then this solution, it may or may not, still be appropriate.
Days camping (2016)----181 days
Days camping (2017) --- 52 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi, w/air suspension
30 years RV'ing
12 different RV's