The best solution for feeding current through the housings of your devices are feed-through terminals. They are ideally suited for discrete or enclosed devices used in power supply applications.
OMNIMATE Power feedthrough terminals
VWGK 6 with solder connection
WGK 50 with clamping yoke screw connection
PGK 4 with "PUSH IN" spring connection
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+49 5231 14-0
+49 5231 14-292083