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Perola

I purchased a boat a year and a half ago, with wrecked engine. Long story, but I managed to get it running. There is a transducer installed, through hull, with a Fuji connector. Cable is branded Airmar, but I can not find any other labels on it.

Then, by chance, I found a used DSM30 and a C70 Raymarine for a few coins. I have tried for a year now to find a transducer for this echo sounder without any luck. I found one P66 which were supposed to match, but the connector looked more like Standard Horizon. Part number on this is 31-493-1-01, and I have not been able to find this online. I found a 31-492-1-01, which was a P58 with Generic marking.

So I am still stuck. That is why I would risk to try to connect my existing transducer to the DSM30. I know that this is not recommended, and it might not work. As I understand, the DSM30 needs a sense signal in addition to negative and positive depth. I found a diagram suggesting to strip leads from pin 4 and 5, attached here. (if I managed to attach it)

And then take the positive and negative pins from the Fuji connector in on pin 6 and 7 on the DSM. Also attached diagram. (same as above)

So what would I risk? To burn the DSM? To burn the boat, and all other boats in the harbour? To simply ruin both transducer and DSM module?