Camera Connecting Cable for Trailmaster to Nikon D3300

I recently purchased a Trailmaster TM1500 AIR monitor but cannot figure out the proper camera connecting cable I should buy to connect the Trailmaster to my Nikon D3300. Would love some help on this!

I don't know of any "off the shelf" cables available for that setup since Trailmaster has been out of business for a few years. You can make our own if you are a DIY type of person. On the Trailmaster end you have a common 3.5mm stereo plug with the tip being shutter, the ring being metering and the barrel being ground. On the camera end the easiest way is to purchase one of the cheap wired shutter release cables available at Amazon, eBay, etc. Then cut off the pushbutton end and connect the three wires to the stereo plug. Or you can contact the guys at TRLcam.com and they will make you one at whatever length you need. They will also have a PDF copy of the manual if you need it.

Thanks Jeff, just contacted TRLcam.