A CW-compatible, pulsed H- superconducting linac PIP-II is being planned to upgrade Fermilabs injection complex. To validate the front-end concept, a test accelerator (The PIP-II Injector Test, formerly known as PXIE) is under construction. The warm part of this accelerator comprises a 10 mA DC, 30 keV H- ion source, a 2 m-long Low Energy Beam Transport (LEBT), a 2.1 MeV Radio Frequency Quadrupole (RFQ) capable of operation in Continuous Wave (CW) mode, and a 10 m-long Medium Energy Beam Transport (MEBT). The paper will report on the installation of the RFQ and the first sections of the MEBT and related mechanical design considerations.
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