  The muon-to-electron conversion (Mu2e) experiment at Fermilab will be used to
search for the charged lepton flavor-violating conversion of muons to electrons
in the field of an atomic nucleus. The Mu2e experiment is currently in the
construction stage. The scope of this paper is the cryogenic distribution
system and superconducting power leads for four superconducting solenoid
magnets: Production Solenoid (PS), an Upstream and Downstream Transport
Solenoids (TSu and TSd) and Detector Solenoid (DS). The design of the cryogenic
distribution system and the fabrication of several sub-systems was reported
previously. This paper reports on additional fabrication and installation
progress that has been performed over the past two years. Lessons learned
during fabrication and testing of the cryogenic distribution system components
are described. In particular, the challenges and solutions implemented for
aluminum welding are reported. A description of the process used to qualify the
welding procedure and welders for welding the aluminium stabilized NbTi
superconducting power leads is provided. Additionally, the progress made with
regards to installing the power leads into the cryogenic Feedboxes is covered.
