Humour me here

[1616six]

Pretty easy way to do it tbh, I might rig something up, I have spare 501 bulb holders, just wire them into something that comes on when the lights come on and prove my point to him. He still thinks it won't work haha

You said wire your sidelights to your indicators though which wouldn't work.. Wiring additional bulb holders to your sidelights and using 501 Amber bulbs will work though