I believe the instructions on Slingmods walks you through that option. I followed the instructions and all 6 work as running lights.
"Optional wiring for all 6 headlights running and center as high beams. Please note, we do notrecommend wiring for all 6 headlights unless you are running LED headlights on all 6 housing. Do notrun 6 OEM halogen or 6 HID headlights on the same headlight bypass circuit! "