Brake fluid leak from Brake line

I have the brake fluid reservior lost a volume from Max to Min on
89 Civic. And I find the leaking under the hood between front and rear
seat. I believe that the leaking is coming from the connection. It
could be the brake tube is leaking which connects
to the rear brake. My 89 civic Hayne manual does not have the diagram
about the brake line connection. so I don't know how many
piece of brake line made up the brake system to rear brake.
Does anyone know the a website showing such diagram?