In the package with the SCN-500 EMC Scanner there is a small plastic bag with three screws and an Allen key. Those are for mounting the ZR module.

Mount the ZR module and fasten it with the upper screw first. Then fasten the two screws a the bottom.

Connect the 15-pin D-SUB and secure it with the two screws. Use a regular flat head screwdriver.

Connect the probe holder to the ZR module.