The starter grounds through the block when it is mounted on the engine. The ONLY cable that hooks to the starter is the one coming from the relay.
The engine is grounded with a strap or cable from the frame to somewhere on the block for ground.
If you have further questions on this, please feel free to reply.
Thanks for asking!
__________________
If this has helped you please click ACCEPT any BONUS tip is very kind of you. Please leave feedback.

