I cannot find the correct temp sender for my 1996 B2300 ( 2 wire )

[Stringbean1073]

I’ve had this truck , 1996 Mazda B2300 for a few months and the previous own bypassed the temp sender for the temp gauge on the dash . Almost everything I read tells me the sender is on the block around the oil filter area but on mine it is in line with the heater core hose . If I jump this plug it will peg the needle to hot . I have now bought 6 different senders all with different resistance values . None are correct . I can’t find anything online about it , only the single wire . I’ll send a pic to see if anyone has the same .