You should have a fresh water inlet, somewhere on the side of the camper. You will be able to hook a "White" water hose to it. The white hoses are designed to be drinking water safe. You will also want to get a pressure regulator and attach it to the water hydrant. You will then hook the hose to the regulator.
That will allow you to get your water directly from the hydrant.
You will also need sewer hose, that attaches to the outlet under the camper. Always empty the black tank first and the gray tank last! The gray water will help wash the solids out of the hose.
Your fresh/city water inlet should resemble this:
The fill port for the fresh water tank, should resemble one of these:
If you use the hose and city/fresh water inlet, you will not need to use the on-board water pump. If you put water in the tank, you will need to use the pump to pressurize the system with water.
You should also probably sanitize your entire fresh water system. There's a guide that Sunline distributed and it can be found here: Sunline Spring Startup Guide