Here, I've circled what appears to be a ground connection. Solder the coax shield to that pin there at the top where it protrudes from the elevated daughter-board.
For a 3-volt wall wart you could use a model EPS030100-P7P power supply from CUI inc. Go here:
http://www.digikey.com
and search for the model number above. They are under $10 in single unit quantities and they have almost 300 in stock right now.
Cut the connector from the end of the cable and solder the wires to battery terminals. If you decide to proceed with that someone here can help you figure out just exactly where to attach the wires. On the other hand, these units usually go for well over a year with fresh batteries...
For a 3-volt wall wart you could use a model EPS030100-P7P power supply from CUI inc. Go here:
http://www.digikey.com
and search for the model number above. They are under $10 in single unit quantities and they have almost 300 in stock right now.
Cut the connector from the end of the cable and solder the wires to battery terminals. If you decide to proceed with that someone here can help you figure out just exactly where to attach the wires. On the other hand, these units usually go for well over a year with fresh batteries...