…. get a flashlight and look for where the wet spot begins. You know you have a leak near the inspection plate..... work your way back or up from there. While its running, use a flashlight and look around...… if it's leaking that bad, you should be able to track it down while it's running. That's almost pouring oil...…. I had an oil pressure regulator crack, it was a really bad leak and oil was everywhere from the bottom, just had to keep looking upwards. However theres a chance it could be the rear main..... but I've never seen one go from not leaking to pouring. If it's the rear main and you are somewhat mechanically inclined, it's plenty doable, but it can be a day of work.