Improved methods and apparatuses for treatment of posterior pelvic floor repair, including rectocele and related pelvic organ prolapse, are provided. The invention may use multiple redundant proxies capable of receiving commands and waking computers within a broadcast domain to wake computers that may not be able to directly broadcast to one another as part of a Wake on WAN system. An external time may be defined. Each elastic seal has a U-shaped cross section and is engaged and fixed to one of the opposing peripheral surfaces in a state in which an annular groove between inner and outer peripheral lips opens into the space with the higher pressure out of the second connecting space and its adjacent space. The invention can effect a reliable electrical connection.