How do i disable Frustum Culling? Please its really necessary.

Thank you.
Im not going to have my project without any culling. Im just going to disable the frustum culling and make one customly.
The cubes are instances already. The project that im showing is not the original project but a simplified test. The original uses actual characters.
So anything with bounds is not the solution.
The best solution is to disable the native frustum culling.
Please is there a way to do this? Its very necessary.

Yes im willing to change the source code if necessary. I just need to know where in the engine code is the frustum culling happening.
Even if that requires assembly.