need help with install of oil pres gauge

I have been following some excellent instructions given to me by another forum user in regards an electric oil pressure gauge But on my 2000 GT it seems that a "plug" that is easy to see in this users instructions is not on my oil pump housing. The how to follow the install on a 2004 model gt and I have a 2000 GT, I didnt think that the oil pump housing would be any different.

SO anybody with a 2000 gt please offer your advice as to how to install an oil pressure gauge. I am using an electronic gauge, and I have the sender I just need a place to put it.

Thanks alot!