I think the mast looks to be a given. That poor SEU looks a little thread bare too.
Besides the bonding jumper already mentioned, for wet locations, 312.2 also says to use fittings listed for wet locations on raceways entering above the level of uninsulated live parts like in that disconnect.
What's going on with that bare EGC on the SER? It looks like it's either a different type of wire where it goes up into the lug or some of the strands were back wrapped to make it fit a lug that's too small for it.
I believe the connector clamp should be outside the enclosure, unless it's also listed for use that way.
