Florida ? Two spacewalking astronauts took on cable and antenna work at the international space station Saturday in their final trek outside, but encountered last-minute difficulty with a connector and had to leave one job undone.

Lead spacewalker Danny Olivas and his partner Christer Fuglesang unreeled 60 feet of cable for a new room that will be added to the orbiting complex early next year. The pair also hooked up a couple of Global Positioning System antennas and replaced some electronic equipment in their second excursion in three days.

Everything went well until near the end of the seven-hour spacewalk, when Fuglesang had trouble hooking up one of the cable connectors to a panel on the space station. What’s more, his helmet camera came loose and it was difficult for flight controllers to watch him work, given the wobbly, upside-down pictures.

“We thought you were doing tremendous acrobatics,” Mission Control radioed.