Return style fuel lines identification

[Maximus1]

can anyone tell me which fuel line is the feed line and which one is the return line? I’m guessing that the 3/8 line on top is the feed line and the 5/16 line on bottom is the return line. Thanks

 

[Maximus1]

Anyone?

 

[Doubeleive]

The 3/8 line is the inlet. 5/16 is the return