N/T block Knock sensor location?

Can anyone tell me what their experience is with the threaded (or non-threaded) hole for the knock sensor in N/T blocks is? Some have the boss, just not tapped. Most say theirs was tapped and ready to go.

I used a N/T block for my stroker build and found that this location has a spot for it but looks like there is a plug in it. There isn't any place on the head of the plug for a screwdriver or wrench. It's just flat. Haven't messed with it yet until i know for sure it's a plug.

What block are we talking about? Im assuming the nt 4g63?

Yes, 1g non turbo 4G63.