I’m trying to connect my wallet on Makers Space, but keep getting an error the wallet is already connected to another account. Any idea, where I can see what accounts the wallet is connected to and how to modify?
Welcome to the MetaMask Community @EnricoPICasso!! 
You will need to contact support of Makers Space for assistance in connecting your wallet. Typically there is a “connect to wallet” button on the home page. When you select it, you can select your MetaMask wallet and then the specific address/account you would like to connect to. Every site is different though, so I recommend reaching out to support of Makers Space.