Yeah both of those links work fine for me too ; but I am currently signed in with an account that has restricted (i.e. support) access.
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How to "navigate" there for me is;
Log into support ; https://support.ca.com/irj/portal/newhome
In the "Knowledge Centre" box click "Documentation"
Choose "CA Clarity PPM 13.3.00 (On Premise - Restricted Content) -US English" in the "Select a Bookshelf" drop-down (its a BIG list in there!)
That should take you to ;https://support.ca.com/cadocs/7/CA%20Clarity%20PPM%2013%203%2000%20%20On%20Premise%20-%20Restricted%20Content%20-ENU/Bookshelf.html
and the "Technical Reference Guide" is in the first section.
(but if your account doesn't have access you'll probably not see the right values in the bookshelf drop-down - that link is much the same as the ones posted earlier in the thread)