M50 Knock Sensor ?

[SmokinTires]

I know S50's have 2 knock sensors along with OBD2 cars. How many do 93' M50tu's have, I can swear that it only has one, right?
I know of 2 shops that say they only have one, and most others aren't sure.

[Ryan Stewart]

The online ETK states two. I would assume so since the S50 is basically a larger displacement M50 /w cams. The rear one is kind of a pain to get to though.