the plug in the first picture is a coolant temp sensor that tells the ecu when the motor is warm, every Honda I've seen since 88 has this sensor so the plug is there you might just have to lengthen the wires, I forget off the top of my head what the wire colors are for it. And it is always the same two wire round plug.

The sensor in the second pic is the evap purge . Emissions stuff, not needed, won't throw a code, don't worry about it. On the last ls motor I built we just removed it then JB welded in the hole left by it.