3-wire upstairs red to red from 3-wire bottom switch
3-wire upstairs black to white from 3-wire bottom switch
3-wire upstairs white to white from panel
3-wire downstairs black to black from panel
3-wire upstairs red to red from 3-wire bottom switch
3-wire upstairs black to white from 3-wire bottom switch
3-wire upstairs white to white from panel
3-wire downstairs black to black from panel