Connecting structure for connecting a filter housing to a filter housing retaining structure, cleaning system, filter housing cover for a filter housing and method for connecting a filter housing cover to a filter housing retaining structure

A connecting structure connects a filter housing to a filter housing retaining structure. The connecting structure conducts a liquid that is to be cleaned to the filter housing and discharges a purified liquid. The connecting structure includes a filter housing cover that connects to the filter housing and that receives a filter medium. The filter housing cover has attachment elements that connect to corresponding attachment elements of the filter housing retaining structure to establish an exchange of fluids between the filter housing retaining structure and the filter housing. Filter housing cover guides are on opposing sides of the filter housing cover; and guides on the filter housing retaining structure engage the filter housing cover guides when connecting the attachment elements of the filter housing cover with the attachment elements of the filter housing retaining structure to support and linearly guide the filter housing cover during the connection process.