hi, here is a diagram I made wonder if anything with expert advice can comment. thanks

How I wired it - explanation:
The 'power inverter' is connected directly to the car battery. The on/off switch of the power inverter is connect to the terminal 87 on the relay. Ignition/ACC is feeding to terminal 86 connected using a 'led switch'.

Terminal 30 should be the car battery but I already have it wired to the power inverter to give it constant. It requires just a flicker of the on/off switch to turn on the inverter on or off.

 

having two switches there is redundant. i would run it with out the ign switch and only use the switch off the inverter. if you want the switch from the inverter to only work when the ign is on then wire the ign wire to 87 and 86. if not, run 12+ to 86 and 87. that will allow you to turn the inverter on/off as you pls. ground out 85 and run the power wire from the switch of inverter to 30 with a fuse if it doesn't have one already. this way your power invert will only trun on with the ign on.

 

I only have one switch the other switch is the power inverter on/off itself. the other switch allows to choice if in case I dont want the inverter on during ignition I dont leave it on. I cant really relocate the power wire from the inverter is mounted....

 

then wire the wire coming off the switch to both 86 and 30.

actuallt, to be safe run 12+ to 30 with a fuse in line.