Different radios (and AP) have different connectors.
The normal way of connecting to them is by soldering/crimping necessary wires to the connector that plugs in to the radio.

So, for a normal installation you have to connect three (or four) wires to that connector. In the same way as you connect wires for headset, PTT, power etc. to the connector.

With Aviation Companion two alternatives are suggested:
1) Cut off the small connector and solder/crimp the wires to the radio’s connector. This gives an compact solution. If your radio has nothing else attached to the connector this is the way to go.
or
2) Solder/crimp the enclosed extension cable to radios connector and plug Aviation Companion in to the extension cable. This gives a solution where the Aviation Companion easily can be detached from not only the radio but also from the wiring harness too.

The small connector is carefully selected for small dimensions and low weight to match Aviation Companion.
The RS422 version comes with open wire ends or optionally with connector for Becker AR6201.

Since I have a Trig TY91 radio I opted to design a plug and play unit for this radio. This module has the benefit of having two RS232 ports, one to talk to the trig and another to talk to other devices such as an EFIS or Autopilot.

The data packets are handled such that they will be buffered and forwarded on uninterrupted, even if data arrives at the same time on multiple ports. This prevents any chance of packets being corrupted which can happen when you simply connect two devices to one serial port.

There is a Wifi access point which by default is only active for 100 seconds after device power up, and on the webpage you can choose baud rate for each serial port as well as select where data from each source is routed. You can also specify the device BLE/Wifi name, and also I have included Over The Air firmware updates so if the Skydemon BLE implementation is updated in future with more features, you'll be able to upload a new firmware file without having to remove or touch the module.

Hardware and software is fully custom as with the Swedish option posted above, and the casing is CNC machined aluminium, anodised black. The casing mounts to the back of the Trig radio in such a way that it fully strain relieves the connector on the Trig, which is already a weak design and should not have any extra leverage applied.

The same hardware also supports a standalone version however this is not yet available for sale as I am still refining some extra features on this version. The advantage of this standalone BLE module is that you can connect two totally different devices on different baud rates.

The modules are available for sale here, and the initial batch will be about 3-4 days for dispatch from the time of ordering.