connect my sewer lineinto my home sewer system

Here in Austin, it is similar. A sewage clean-out is perfectly OK. In fact, it is encourage to have more than one due to oak tree roots getting into lines. However, if that access to the sewer is called a dump station, the fur will fly. Neighbors will be calling every LEO saying there is a biological contamination hazard, etc.

Calling it a clean-out and being discrete about using it (preferably having it not visible from the road) for its real purpose will go a long way.