Look on the side of the Scamp
by the sink. In older Scamps and some newer ones there's a hose connection labeled "drain water" or some such. If you go to an RV Park (Resort), that's where connect then into the drain. Many RV Parks (Resorts) don't have sewage connections, in that case a bucket with a lid and a hole for a hose to go into. You have watch the bucket to make sure you don't overflow it.
If you got a campground or boondocking
the bucket is required.
Some of the newer trailers will have the optional 26 gallon gray water tank. That's esay to detect, on the drivers side jut behind the wheel is a 3" pipe with a cap and a handle to open the drain valve with.