I circled the hose that’s on the one I found in the picture the only thing I can see is a shiny nipple on my car
I have a 2000 Honda Accord and I noticed that one of my hoses are gone and I found a picture of one with the hose on it but I don’t know where it goes

 

In that photo, the circled location is for the coolant temperature sender unit for 98-99 models. It is not a hose; but, a wire harness and connector.

Your 2000 Accord doesn't use that sender unit. On a 2000 Accord instead of the sender unit, a sealing bolt is used in its place.