A low-profile electrical connector includes a housing having exterior perimeter sides and top and bottom surfaces, where the bottom surface is configured to extend along a user's body site and the top surface is spaced above the bottom surface. The connector also includes a side-entry guide channel disposed along the bottom surface. The channel includes an opening along the exterior perimeter side that is configured to receive an electrically conductive element. The channel is also configured to guide the electrically conductive element within the housing. The connector includes a receptacle positioned within the housing and forms an electrically conductive interface with the electrically conductive element.