1st free thing that could eventually help is the OEM part catalog, that you can find on store.commoto or ducatiomaha.com
Shop manual, we host it on the french Hypermotard board, but it's in french... but plenty of pictures.
You have to drop the tank to remove the airbox.
I understand you have the 2 front bolts out so you can lift the front few inches. That method is usually enough to install the DP lid, not installing the large MWR filter.
You're not far from tank removal from this point.
Take the harness away, unplug the fuel pump and unbolt the running fuel line under the tank.
Then pull the whole thing out.
Just thinking about it now.
You can find on youtube 4 videos of the big tank install, where they remove tank and airbox