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I'm trying to use relay as high current motor driver. 2 SPDT relay module I'm not sure how to connect flyback diodes. This is my current sketch enter image description hereI've read a lot of on DC motors, but I couldn't find anywhere a schematic for 2 SPDT relay motor driver with flyback diodes protection. Because of SPDT relays I can't short circuit the PSU (S1 + S2)

I'd be glad with any advice/guidance.

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The configuration you have in your sketch looks like a good solution. Another approach is to use 2 zener diodes rated for just over V+, connect them in series in opposing directions, across the motor terminals.

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