Zero Turn Mowers

I have a Husqvarna Z246. Had for about a year now. Like the machine. No issues so far. Other than filling up the tank on every cut, does anyone have an idea for a gas gauge? I thought about cutting a hole on the inside of the fender to see the gas tank. Or should I just look inside and see where the lever is? Wasn't sure if the was an aftermarket cap with a gauge. Hope not too silly of a question...