Not sure how helpful that is. Insurrection in that law is defined as engaging in rebellion or insurrection, or helping anyone who does that. It’s going to be hard to set a legal precedent using a tautology.
In all likelihood they’d probably go with what the law defines seditious conspiracy to be as a guidance.
If two or more persons in any State or Territory, or in any place subject to the jurisdiction of the United States, conspire to overthrow, put down, or to destroy by force the Government of the United States, or to levy war against them, or to oppose by force the authority thereof, or by force to prevent, hinder, or delay the execution of any law of the United States, or by force to seize, take, or possess any property of the United States contrary to the authority thereof, they shall each be fined under this title or imprisoned not more than twenty years, or both.
I mean, that also fits very nicely with the dictionary definition of insurrection.
It’s not like these are words of mystery. And we have ample records of what was going on when they were codified. So it’s not hard to determine what was meant when they were written.