I recently built a megasquirt using the Westfield MX5 guide but I used the DB37 connectors instead of soldering the OEM connector to the board. I was planning on using the pinout on the Westfield site to make a wiring harness. I was wondering if I need to wire anything differently to use a wideband O2 sensor and an IAT sensor? Also, does anyone know what the orientation of the OEM connector is in the pinout?

I couldn't get the picture to save as a JPEG so I just linked it below:
https://get.google.com/albumarchive/...71560849354178

 

Noticed it's in color?

 

I'm not sure I understand what you mean by that

 

Hop into your car and take a look at the connector and you'll see what I mean. ��

 

got it, probably should have looked in the car before posting...thanks for the help anyways

In your pin out diagram you have some of the connections labeled with diodes, what's the purpose of those, and do I need to wire them if I'm not wiring the OEM connector straight to the board?

 

You can leave out the diodes if you have the MS3X card and added the wire mentioned in my build manual

 

https://trubokitty.com/#/ms3xassembly

 

If I may make a suggestion, I install the transistors first. That way it is easy to measure for shorts (diode test) without other components interfering and giving false readings.
Also, I don't use a MS output to active the main relay for the MSM. I use 4S as the input for an active low circuit to ground 3H. Iow, any car that has 12V on 4S gets a ground on 3H.

Very professional page btw, congrats!