Canon WFT-R10A Wireless File Transmitter for EOS R5 C & R5 Mirrorless Camera - Manual (Page 15)

Attaching to the Camera
Attaching Batteries
Using a Household Power Outlet
Button and Dial Operations
Set the camera's power switch to 〈 〉 before attaching the transmitter.
1.
Remove the contact covers.
Remove transmitter contact covers (1) and (2).
Attach transmitter contact covers (1) to (2) to store them.
2.
Remove the battery from the camera.
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