Your car will have the T5 transmission. The fill and drain plugs are on the passenger's side. There is a bolt on the driver's side that looks like a fill plug, but it's not. Many people have tried to remove this bolt thinking it's the fill plug and then they had to remove and disassemble the transmission to have the 5th gear/reverse shift linkage put back in place. Be sure that you remove the fill plug and not the bolt.
And as a precautionary side note based on the thread title: do not service with oil.
Your 2006 T5 is spec'd for ATF.
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