Phoenix inverter 12/375 DIY remote switch led button help

[Sillkremla]

I have installed a remote switch button that works fine but I also want to activate the led light when pushed in. I soldered some wires for the led light but don’t want to damage the inverter so any tips on how I can connect the power to my button to get it to light up when pushed in? Measured between the H & L in hope of using the terminal to power the light but didn’t get any voltage. Victron has there own remote control paneI which has a light when activated and is just connected to the H & L port so shouldn’t there be a possibility to connect the light on just these connections? I saw this post but about a diod to protect the current flow. https://www.cruisersforum.com/forums/f14/remote-switch-for-inverter-next-level-270024.html Is the diod something I need to install as well? The current button is connected this way. I haven’t connected anything more than the closed circuit to see that the remote switch works in case of messing anything up.