I was so focused on the coolant plug I missed the manual page shows a V6.
Here are two more images.

Aside: Is there a thread sealant on these plugs?



Passenger Side


Driver Side

 

Good find for those pictures. I don't know if there is sealant on them from the factory, but I would put some on. I like liquid Teflon type products rather than Teflon tape.

 

I looked at the liquid Teflon that I use on residential plumbing and its temperature range is 0-350 F and 200 PSI.
Not as cold as it can get here with this winters low on the order of -20 F.
Google puts the operating temperature range of a combustion engine in the low 200s, so that looks to work.

Might I suppose that the low temp will not matter if the system is not under pressure?