Return fuel line for 190c Mercedes Help

[eclipse_22]

I have a 1962 190c, and i took over the project, basically i put the tank back on but noticed that it only had one line running to the front which was just the basic fuel line, is there a return fuel line for these cars? if yes, from where, like on the carb and what thickness, cause if there is i need to run a new one. THANKS

PLease help asap!