First, you have to replace the cable as you will need a minimum of 4 wires, 2 of them for the transmit and receive switching, and a shielded cable for the audio. It would be nice to have another as the common for the TX/RX switching but the shield is commonly used for this.

You will need to re-wire the switch in the candlestick to allow switching from RX to TX.

Google "D104 to cobra 29 mic wiring" and you will find many hits for this.
Your microphone was not intended to work with this style of radio. To save a buck, the CB manufacturers removed a 50 cent relay to do the transmit/receive switching. You can see what happens when you remove the microphone when you are listening to the Cobra. It'll stop producing any sound. This won't happen with the Tram,

Also, you may have problems with the microphone as it is high impedance as indicated by no transformer or preamp in the base of the microphone. This may be a problem as the Cobra has a relatively low impedance input.