This falls under dust prevention. If you display your retro handheld devices you need to invest in a couple of blank dummy carts to put in your system. The cartridge slot is the easiest opening for dust/debris to enter your device, not to mention getting your cartridge reader dirty. Placing a dummy cart in your system will prevent filth from

getting in and will put zero added pressure on your pin connector. These systems and cartridges are friction based devices and personally I'd rather have a blank cart inside the system rather than an actual game. This will reduce wear on your cartridge reader as well as the cartridge itself. They're cheap and easily found on eBay.