Please confirm my Fuel filter is connected correctly

[Z-Rod]

I have installed my AC Delco GF 845 fuel filter and regulator in my 1994 Z-71. It has one 3/8 fitting on one end, and two fittings on the other end, a 5/16 fitting in the middle and a 3/8 fitting next to it. (See picture)

After running air thru the filter, It seemed apparent that the inlet was the single 3/8 fitting, the outlet was the middle 5/16 fitting and the return was the 3/8 fitting next to the 5/16 outlet. Is this correct?

I have run the truck several times around town and have had no fuel issues... It just doesn't seem the way I would have guessed the connections should be.

Thanks,

Z-Rod