Yikes, it looks like used a sledge hammer to make the hole in the floor those are coming through. Are you sure that’s supposed to be like that? I would clean that up.
Those could very well be the low point drains in which case that would make sense as to why your tank never fills, it’s all dumping right back out.
Follow those lines back inside. There should be ball valves somewhere to close each of them off. The valves may be located on your wetbay panel, and would be marked “Low point drains” or something like that.