I recall a few years back one of the "Darwin award, Top 10 Recips." Was out "Frog Giggin". The lights went out on their old truck. So they stuck a .22 LR. shell in there to make do. It heated up and """POW!""", shot him in the family jewels. Although it didn't kill him it did take him out of the gene pool.
I guess be thankful the last service guy didnt have a couple of 45-70 rounds in his pocket.
I've seen that done before.
If they had used a disconnect, instead of a modified "fused disconnect", you wouldn't have noticed.
They must have been out of that size disconnect at the supply house.
Hopefully, it has a circuit breaker upstream.
So, did you install fuses or leave it like that?
Does it violate code, or just look funny?
(By the way, all things that look like circuit breakers are not circuit breakers.)