Sub woofer Hook Up

I am new to the Audio World and need some help. I have a sub I bought 2nd handed with no manual. It has 2 RCS hook ups in the back and they read:  R-INPUT

                                                                    L - LFE IN

Which one or do both need a cable hooked up to it for the sub to work right?

If only 1 needs hooked up, which one.

I have a new Preamp coming so Im not sure yet but I think it has 2 connections on it?

Any help would be greatly appreciated!

Either one should work.

68pete, so in other words I only need 1 cable, Thanks for your help!
You can only use one cable if you have an A/V receiver. If you have a separate preamp and amp you will have to do this! It gives you all the options you will need!

Tell us the other components in your system and you'll get more useful feedback.
More useful feedback?  I showed the OP every possible method  to hook up a subwoofer. Read!