Canon WFT-R10A Wireless File Transmitter for EOS R5 C & R5 Mirrorless Camera - Manual (Page 22)

Using a Household Power Outlet
1.
Attach the DC coupler.
Attach DC Coupler DR-E6 (sold separately) the same way as the
batteries.
Pass the DC coupler cord through the battery magazine cord groove.
Insert the battery magazine all the way in to secure it.
Note
The DC coupler can be used in conjunction with a battery.
When only one DC coupler is used, inserting it on the camera side
will power only the camera. Inserting it on the transmitter side will
not power the camera or the transmitter.
22