🤦🏾my worst nightmare

[Terry Lindsey]

09 Cadillac CTS 3.6
This damn car is a nightmare on elm Street type shyt, I hate this car so bad
To see if the starter was bad,or if any grounds were corroded or Rusty etc
So I jumped pin#30 with pin#87 starter was supposed to roll over but it didn't nothing happened so I took a test light and tested the pin#30 and didn't light up no power, so I started looking at the 2 thick red power cables on the red cap post the real thick one I checked up and down the cable and I don't see any fusible link on that one ,the other not so thick cable goes to the alternator I checked the cable up and down and I see a black square flat box with the words 200 amp , is that a fusible link? and can that be the cause why pin#30 has no power? at this point any help is appreciated