new motor!

[S.W.B.C]

Greetings,
Well since my head turned out to be shot I started looking for a complete motor...found a 1998 Z3 WITH 33K original miles and got it for 1200.00. The motor is like new!
Now the engine is in and all is well thus far but the one thing I neglected to mark were the fuel lines and now I am not sure which is supply and which is return, both on the frame rail and on the lower engine block. Any help greatly appreciated. I am pretty excited as I have never driven this car or for that matter any 318ti so looking forward to getting the car running.
Any other words of advice prior to start up also appreciated.
Regards Silas

[Bluebimma]

Front of rail is supply, rear return, line from the fuel filter is feed, line to tank with no filter is the return.

[S.W.B.C]

Thanks so much. Hopefully the start up will go accprding to plan. Sure appreciate the info.
Silas