How to Filter High Frequency Noise from the Voltage Source on the Input of Control Electronics of Large Machines?
Several suggestsion

Use a GROUND plane under your filtering. Otherwise the SHUNTING element will be severely degraded because of Return_Path inductance.

Plan on inclusion of dampening; a series resistor of size SQRT( L / C ) is a good start.

inductors generate an external field; sensitive circuits may be upset

inductors also respond to external fields, thus high_current high dI/dT wires and motors and transformers may be a problem, ruining your attempt to filter