I recently bought a 120 gallon tank with dual corner overflows. It came with a 40 gallon sump and so

I recently bought a 120 gallon tank with dual corner overflows. It came with a 40 gallon sump and some of the plumbing. I’ve been wanting a drilled tank with a sump for a while now and have done some research on sumps and have even previously worked with sumps at a previous job. But does anyone have any good reference material for setting up and plumbing sumps?