Play the strings in open chords, like a G chord or an E chord and listen to the high strings. If it sounds like they are not sitting down well and ringing true then put your first finger over the e, then the e and b, then the e b and g... Figure out which ones are ringing, or buzzing or whatever the term is for this, and add a retainer to those strings. By putting your finger over the string behind the nut it will pressure the string into the nut, like a retainer. It is not always required, but the e and b needed it on my neck.
it all depends on which headstock - angled headstocks don't require any, a 3+3 headstock would most likely need just on on the middle two strings but could use two if you weren't getting enough pressure on the next outward pair, a 4 in-line uses one on the D & G strings (same with a 4+1)
for bass, I definitely prefer the Hipshot version above the Fender style button