1st picture is the connection from your wiring loom to your neutral switch. It's a 4mm bullet connector from memory that sits just below and infront of your gear shift selector. If you need to replace it, it connects into the wire harness that runs from the ignition advancer to the red plug on the LHS of your bike. A single wire should emerge from that harness about 3" back from where it exits the LHS sover from your engine, the one with HONDA stamped on it. That wire runs to the neutral indicator sensor.
2nd photo looks a lot like a fuel line tee connector.
3rd NFI !
4th as BAHNST said