These two 9/16” bolts are all that hold the starter motor in place. Note that the trans cooler lines partially obstruct access to the inboard bolt; a short socket with an extension makes removing this one a bit easier.
A deep 9/16” socket can be used for the outboard bolt. It doesn’t make a difference which of the two you remove first, since they both have to come out.
Disconnecting the electrical connections is next. If you haven’t already done so, be sure to disconnect the positive terminal of your battery to avoid getting a shock. The main power leads are held on with a 5/8” nut; the solenoid lead is a 3/8” nut.
Here’s the starter taken from the car. The culprit turned out to be a faulty solenoid terminal that allowed the solenoid to intermittently make contact and short out.