Hi Rob, the 2510-21-112-5311 (for the M101CDN "Iltis" trailer) is the shortest I have seen. The central cable, excluding plug and connector block, is 44". The overall length including pigtails is 58". I am curious is this short length is adequate for an M100 trailer hooked up to an M38 or M38A1. I don't have an M100 trailer handy to measure.
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