Gas leak at sending unit

Went out and took another look. The post that the fuel gauge wire
is attached to is loose. I can wiggle it causing fuel to come out around
it. It's hard for me to see what holds it in and can it be tightened up.

Better yet, what would have caused it to come loose. This was a new unit
so rust, etc. is not an issue.

Anyone got one on the bench they can take a pic of from both the inside and outside.

Thanks,
Tony