Actually, they will not care. It is not an issue.
Many dealers even encourage the mod since they know it improves the versatility of charging and thus the versatility of the vehicle.
Worse case, when you bring it back at the end of the lease, sell it to someone else in exchange for their stock unit. Or if you are getting a new leaf, swap it for the stock unit from the new vehicle. It's done all the time.
asemeco wrote:The first time you take it back for service, if they notice the mod, they are not going to be happy.