Adobe illustrator, arrowhead in the middle of a line
I'm new to Illustrator, I was going to create some schematics with lines that have arrowhead in the middle, indicating the flow of liquid or gas.
I found the options to add arrowhead to either the start or the end of the line, but no option for the middle of the line.
I learned that an additional anchor point may help, but I don't know what to do next.
Any help is appreciated.