Push button start Question ??

[Lefthander1930]

1 New 12 volt starter
2 new 12 volt solenoid
Cable fron Solenoid to Batt
Cable from batt to ground
Cable fron solenoid to starter
Push button wire (fused) to batt(2 wire button) other wire to S side of solenoid
Engine cranks with key off

On one of the diagrams it show grounding the I side of the solenoid ?? Why If it cranks ?

If I'm good to go I will try & start with gas & work on the fuel line with new pencil
filter & electronic fuel shut off. No more gettin under hood to turn off gas valve.