12V Electrical wiring - wire nuts vs crimp connections

depends on how much excess wire is available
wire nuts make it easy to replace the fixture, with out cutting and crimping
during MFG production, wire nuts are easier to use than "overhead" crimping, while installing
NEC calls for wire nuts on fixtures , crimping NOT allowed
mfg a mobile residence, the mfg used NEC code, too avoid legal conflicts

i'm not saying NEC covers 12vdc lighting
just saying mfg covered all bases by using ONE standard

for indoor i prefer wire nuts

for outdoor AKA 'car' lighting i use crimps