The principle of warp knitting loop formation in a warp knit structure is completely different than a weft knit structure. In a warp knitting, each needle is fed by individual guides so each needle will be getting yarn from one particular course, which means for making a course in a warp knit structure multiple guides depending on how many needles are operating on the machine. For example, if you are using 100 needles on the machine then need 100 warp yarns which will be attached to individual guides and those guides will be feeding yarn simultaneously for the entire course formation

So for making a course in a warp knitted structure you need multiple guides and they will be feeding the yarn to their respective needles