1990 SP Rev Limiter removed

[TJG358]

So I removed the rev limiter on my 1990 Sea Doo SP. I want to use OEM kill button and Tether to kill it.
Would I be better to ground out the + side of ignition coil or cut out the - side of the coil?

 

[POPPS]

I believe most teather/kill circuits cut out on the positive side,

 

[TJG358]

I am wanting to wire the ground through the OEM tether and kill buttons. I'm thinking by disconnecting the ground circuit it should kill the engine. Does anyone see any issues with this? Will it harm the CDI?