There is an online parts diagram here, it shows an oil pressure sender possibly behind a block heater assembly, which should be easily identified by it's household electrical cord. Coolant sender appears to be on the other side.not being sure about your machine I have to assume one is oil pressure the other water temp. If you get it to running temp then disconnect one see if anything moves gauge wise if not do the other one and go from there, without further info. it is tough to say more, there is a possibility they are other sensors too. you should though see something change readings.