12 Volt MIDTRONICS GRX-3080 JLR Diagnostic Battery Charger User Guide
WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
Continue to "Pinpoint Test C: Voltage Drop Across Vehicle Harness And Battery Terminal".