In power systems, the distribution of electricity is divided into several levels to manage the transmission from power plants to end consumers effectively. Let's discuss the different voltage levels and identify which one has the maximum consumer connections.

1. Primary Transmission Level: This typically operates at very high voltages (usually above 132 kV). Such high voltage levels are used to transmit electricity over long distances with minimal losses. Due to the high energy levels, only large industrial facilities or substations are typically directly connected, not individual consumers.
2. Secondary Transmission Level: Voltage levels here are slightly lower (around 33 kV to 66 kV) compared to primary transmission. It is used to transmit power to regional substations, but individual consumers still do not get connected here due to high voltage.
3. Primary Distribution Level: Operates at voltages approximately between 3.3 kV and 33 kV. This level connects to transformers that step the voltage down for more localized and smaller networks. While more accessible than transmission levels, individual consumers still generally aren't connected here.
4. Secondary Distribution Level: This operates at lower voltages, typically 220V or 440V as used by most household and commercial establishments. This is the final level of electrical distribution where the voltage is set to a consumer-usable range. Therefore, maximum consumers, such as residential and small commercial consumers, are connected at this level.

Given this explanation, the correct answer is: secondary distribution level. This is because it provides the suitable voltage for safe and direct use in homes and small businesses across the vast majority of power consumers.