Start with 2 conductor shielded cable. At the transponder end, strip off about an inch of the insulation, exposing the braided shielding. Push the braid back as far as you can. Close to where the insulation was cut, bend the shield and wires into a ‘U’. Use an awl or small screw driver to work open a hole in the braid at the top of the U. Use needle nose pliers to reach thru the hole and pull out the two inner insulated wires. Strip the correct amount of insulation off these wires (use a gauge), insert into pins (make/female regular or high density d-sub, whatever your connector takes) and crimp. Twist the shield, insert into crimp connector or solder-crimp (see previous post), crimp. Crimp a short length of wire into the other end (if not already there), crimp on pin and insert into any available ground pin. At the UAT end, strip back an inch as above, but cut the braid as flush as you can. Cover the cut braid with some shrink tubing. Attach the other two wires with crimped on pins.
Edit: I see I type too slowly. Yes, an option for the ground pig tale is the connector shown. Put it under any screw or bolt that is electrically attached to the metal chasis.