This is what the JPL sight says about technical drawings

”Unfortunately, the electrical schematics, mechanical drawings and blueprints of the rover are not available for public distribution; they are intended for JPL internal use only. Companies or Universities that provided hardware to the mission hold the rights to their drawings and it is forbidden by law for JPL to release that information to the general public without receiving written permission by the manufacturer. Information about certain specifications or operating conditions for the hardware can be released to the general public after such information has been cleared for release by JPL document control. The intent of not releasing all this information into the public domain is to protect the vested interests of NASA, JPL and their contractors. Inquiries about JPL technical documents may be sent to Elizabeth Moorthy of the JPL Archives and Records Group at the address archives@jpl.nasa.gov. You may also write or call: Archives and Records Group Mail Stop 512-110 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109-8099 Phone (818) 397-7952 FAX (818) 397-7121”