Knock sensor wiring
 

I have a question about wiring the knock sensor on the engine I'm putting in. I believe its the knock sensor anyway, it comes out between the driver head and the intake on the 3VZE. Anyhow, its a different plug, and the one on the engine has only 1 wire, whereas my truck wiring has 2. Can I assume that its grounded inside the motor and only solder the black wire, or is it just a waste of time and I have to take it apart to change the sensor. The latter would surprise me, but with the luck I've been having...

ok, I opened the old one, and see only 1 wire goes to the knock sensor, the other one is factory spliced in afterwards. 1 goes to the ECU and the other to the combination meter, so I should be ok.

Dude was it ok???? I have this same issue?