Indeed there is no click in the CHP. If you want to open the transmitter anyway, its mentioned in the manual how to do : "First, remove the battery cover on the rear of the transmitter. Next, unplug the battery wire, and remove the battery and RF module from the transmitter. While you are removing the RF module, pay attention to the location of the pins that plug into the back of the module. Next, using a screwdriver, remove the four screws that hold the transmitter’s rear cover in position, and put them in a safe place. Gently ease off the transmitter’s rear cover."

You can change the tension on the stick if necessary.