Blowing relay fuses

Hello, I was wondering what could be the cause of a starter relaying blowing. I blew the original relay so I switched with the horn and got about 3 starts out of it and then the car had the same symptoms as the relay blowing with a single click when the key turns. New battery, new alternator and ignition fuses all good, thank you in advance
 
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What should I look for on the cable connections ?