....
...It sounds like an awful lot of labour for such a minor upgrade.
I’m not sure I would want the dealer doing invasive work like this for something that’s not really essential.
I have service manuals for removing plastic in almost all popular models. Hauling of two cables could be a small challenge but hey people install rear cameras with much more labour involved.
My idea of testing was absolutely non-invasive: i.e. in Axela or CX-5 removing computer is ~5 minute. Put my computer in and without hauling the cables and without replacing the hub - we could just connect the HUB outside to test how all things will look and feel on the go. Then put everything back - another 5 minutes.