3 prongs for sealed beam lamps not fitting in connector?

I just replaced the lamp assembly (H6054) on a 98 ford e350 and only managed to get the prongs half way in, though they still work. Since i didn't bother to examine the way it looked like before, i don't remember what orientation the connector was in. Is this normal or do i have to fix it?

The plugs do eventually rust-out…

Well, when unsure, look at the other light. Is it the same? It is a tight fit.(but don't use a hammer.) If it works, it works. Sometimes you do not question WHY. Just live with it.(her)(him) whatever and divorce later.