Owning: HH Glamour (DC-CDI, with self start, without fr disc, DC modded, handle changed to that of Passion Xpro)

I want to install an engine kill switch to my bike.

I have searched through the forum but still in doubt.

I have planned to install the RHS switchgear from Splendor i-smart which has both i3s switch and self start switch. I would be using the i3s switch to fulfill my purpose.

In other posts I found, few are suggesting to install kill switch in between ignition/key switch and battery, but this will result in turning off the headlights too as my bike is DC modded.

Therefore, please suggest me how to install it.

1) in between battery and cdi
2) in between cdi and HT-coil
3) or anywhere else

Please help.
Thanks.