We need more info to tell you how to connect the mic. You need to do some measurements to see if the mic is using a balanced (2 signal wires + shield) or unbalanced (one signal wire and the other wire connected to the shield at the mic end) connection. Also, if you will be connecting the 3.5 mm plug to a standard stereo device, or to a mono device, or to a balanced device ("TRS" connection).
The adaptor posted previously is not warranted to work as you expect. If your mic is balanced, and you connect that adaptor to a stereo input , it won't work as expected. Also, if your mic uses a DIN connector, and the adaptor is an XLR connector, it won't fit.