Serial connector
In the [wiki](https://github.com/ParadoxAlarmInterface/pai/wiki/Connection-methods#paradox-serial-connector-on-the-board) it says "Paradox serial connector on the board" but I'm not sure if it refers to the socket or the connector view.


```
┌───────┐
│ Rx   ┌╵
│ Tx   │
│ GND  │
│ AUX+ └╷
└───────┘
```

Looking at the following photo of the Paradox serial interface it looks like it's the connector view, assuming red is AUX, black is GND, etc.

Can someone please clarify? Thanks!

![serial](https://user-images.githubusercontent.com/377807/154450925-6c05c70e-fede-455c-9d34-7ee8064d789e.png)
