Corolla GLI 1995 knock sensor

Good day mga Sir I'm so confused lang po with my Corolla GLI 1995 model. I diagnosed it twice (TE1-E1 wire jump) and it always shows 12 and 52 codes which is both corresponds to a knock sensor issue, but the problem is I really can't find the location of my knock sensor. Tapos nagtanong din po ako sa isang surplus auto shop ng knock sensor for my car sabi sa akin is wala daw pong knock sensor yung oto ko.

Please help me for those who have the same car model that I have.

Thanks in advance po mga Sir. :)