There are instances when a "one-size-fits all" approach is not suitable for every situation.
For this reason all Bathroom Butler heated rails feature DUAL Entry electrical connections. Meaning they have both LEFT hand and RIGHT hand connections for a straightforward installation. The electrical connection are conveniently located on the bottom of the mounting points.
If it suits better to have the connection at the top simply turn your heated rail upside down. Because not every house design is created the same.