Two Russian cosmonauts did a spacewalk which lasted for seven hours and 29 minutes outside the International Space Station on Friday to setup cables for the arrival of new space lab on December. No leak has happened but the story is remarkable as it surpassed longest Russian spacewalk record in 2000 by 13 minutes.

Space engineers Fyodor Yurchikhin and Alexander Misurkin docked out at 10:36 a.m and went back at 6:05 p.m EDT. They first build the Strela cargo cranes on the Poisk mini-research module (MRM2) The MRM2 is the part of the lab where spacecrafts can dock. Misurkin then used the cranes to guide Yurchikhin while attached to cables so that he could reach the Zarya module, technically known as Functional Cargo Block, to install additional cables on it.

Misurkin was tasked to install an experimental panel called Vinoslivost on Poisk. It will be used to release some materials to space so that scientists can observe its reaction with its new environment. He helped Yurchikhin afterwards.

The two had to complete the installation of the Ethernet cables in the Zarya module and ensure that all cables are properly secured as it will be used by the upcoming “Nauka” Multipurpose Laboratory Module. The new lab will replace Pirs.

“Nauka” is reported to arrive in December, according to an update by Reuters.

During the spacewalk, the rest of the team including Luca Parmitano, who had a leaked spacesuit experience, either remained inside the module or moved to another segment.

The record-breaking Russian spacewalk is the 172nd related to assembly and maintenance. It is the seventh for Yurchikhin and second for Misurkin. The two will do another spacewalk on Aug. 22 to replace a laser communications panel with a small optical telescope.

The longest overall spacewalk record is still with NASA back in 2001 for eight hours and 56 minutes.