Okay so just to clarify from everyone’s ideas and info, I run a fuze box from my battery, to the accessories with the continuous relay inline between the battery and fuze box; that relay will be powered from the radio wire.
Yes
[battery]-[relay/solenoid]-[fuse panel]-[accessories]
And the relay/solenoid activated from radio switched power source.
Although you might do this for extra safety:
[battery]-[large fuse or 12v auto reset breaker]-[relay/solenoid]-[fuse panel]-[accessories]
That way you have some protection between the battery and relay/solenoid.