An apparatus for connecting to an ear canal component of a hearing aid includes a sleeve having a first end, an opposite second end, and a channel extending between the first end and the second end. The sleeve is configured to engage the ear canal component such that the ear canal component is in the channel. A flap is coupled to the sleeve and pivotable into and between an open position in which the channel at the second end of the sleeve is open and a closed position in which the flap closes the channel at the second end of the sleeve. When the flap is in the closed position, the flap prevents the ear canal component from passing out of the channel through the second end of the sleeve.