My currently used battery tray for the Taranis QX7. No need to resolder anything on the Taranis board.
Use some 0.5mm Metal sheets and solder a spring and a big blob of tin onto them to make batterie connection.
There is a little tunnel through the middle bridge for balance lead.
XT60 connector can be securely placed in a little compartment in the tray.
Sketchup file included. Feel free to modify
Das Filament PLA