Safety neutral switch

This is what I have in the car now:
Painless 5001 8 circuit wiring harness.
Switch panel I made myself.
the wiring harness is a relay activation.
So I have the switches wired to the relay activation harness.
Push button start not using the key any longer.
I am running an alternator and voltage regulator.
But I do not have have a starter relay in the car I did not think I needed one I assumed the solenoid on the starter was enough.
This could be my problem.
The car is just about done all that is left is the wiring and some small detail stuff.
I planned on running the line lock power source off the battery disconnect.
To stay away from the power source from a relay.
Is this the way to go?
thanks.
Wiring is not my strong point.
everything isin the car just need to figure out the details of where everything should go.
I did solder every connection to make sure this will last.