Hi Tim,
There are three ports as Outlet on the CR140 and CR280 reservoirs,
which are around the export of the pump.
The other ports are Inlet.
About the fill port and drain,
They depend on how you will install the reservoir.
Mostly, the fill port is on the top, and the drain port is on the bottom of the reservoir.
Please send us an email and then we will send you a picture to show the outlet place. If you have any other questions, feel free to contact us.
shopservice@bitspower.com.tw