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The camshaft end plug is a common oil leak and is located on the side of the head near the EGR valve. Red circle in attached is the location.
Also, minor detail but you are missing a bumper/grille clip near the hood latch and you could use a new ground strap (quite noticeable in your 3rd photo).
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Re: Oil Leak
As stated prior most likely an end cap. Could also be valve cover too. Personally, I use rtv sealant as little as possible but I've found that applying rtv to the end cap o-ring tends to help compared to it not being applied when installing a new end-cap. I have even reused an end-cap with rtv applied and it sealed it completely... that was 15k miles ago. Just have to be careful and apply only a thin coat of black rtv or Hondabond on the end-cap o-ring and do not glob it on. The goal is to avoid any overage of rtv from getting into valves or camshaft.
Also, personally I prefer to replace the end-cap with the valve cover off to ensure the two tabs (legs) of the end cap don't break off during removal, or if they do I will be able to find them before starting the engine. It's a bit of work to remove all items theout of the way to eventually remove the valve cover but once the valve cover is removed it's a good time to replace the valve cover seal, check intake and exhaust valves clearances, replace spark plug hole o-gaskets.
