Hello, for the installation of the connection lines between the wall panels, you can follow the following steps:

1. Enter the custom whole wood design, left-click and select "Installation" - "Connection Line"

2. Connection line style selection: Left-click to enter the "Style" selection, select the required connection line style, and left-click to "Select";

3. Connection line material selection: Left-click to enter the material selection, select the required mapping style, and left-click to confirm;

4. Select the required reduction process

5. Hit Confirm to complete the installation