How to hook up Subwoofer to Focal XS Book speakers

Hello Everyone
NEED HELP!
Recently I purchased Focal XS Book PC Speakers so I was
thinking to add Velodyne Mini Vee Subwoofer. HOW TO HOOK UP
Subwoofer and the speakers.
The Focal have (1/8 low level input) and (L/R RCA Hi level input). From the computer I would run 1/8 - L/R RCA cable to
the Subwoofer R/L LFE input. From the Subwoofer LFE output
I would run cable to the Focals 1/8 low level input or
I should hook up to L/R RCA Hi level input.
THANKS IN ADVANCE FOR ANY ADVICE.