@WOPR73 from your pictures, I can see that you need to remove the bypass jumpers on the distribution board under the 1LC connection.
Are you having problems connecting to the 1LC on its own? Have you ever been able to connect? I can’t see the SZP wired in in your pictures, looks like just the 1LC is wired in at the moment to the distribution board. In this configuration (I can’t see the SZP connected) the termination jumper should be fitted on the distribution board too.
If you still can’t connect, check that your CAN cable from 6HC to distribution board is correct; flat cables like you have are often wired incorrectly for CAN, see https://docs.duet3d.com/en/User_manual/Machine_configuration/CAN_connection#example-of-a-good-cable
Then check your wiring; that the wire from the distribution board CAN_H goes to CAN_H on the toolboard, and so on.
As others have said, if you’re only ever going to run a 1LC and SZP, the distribution board is a bit redundant. You can take two wires from the 6HC (to the 1LC CAN in, then two wires from the 1LC CAN out to the SZP. Set the SZP to provide termination.
If you plan to add more tools, the distribution board makes sense, though the tool with the SZP will still need to be the last on the CAN bus.
Ian