An arrangement forming an assembling aid on crawler chains for track-laying or crawler track vehicles, whose chain link members are equipped with rubber-cushioned coupled pins, and which are interconnected through the intermediary of clamp-like connectors slideable over the ends of the coupling pins and adapted to be fixedly anchored by means of a screw. The coupling pins which are to be interconnected in the assembled condition are provided with securing elements which engage into a slot formed in the connector. Each individual coupling pin is equipped with separate adjusting or setting elements, which protrude cog-like beyond the cross-section of the coupling pin, wherein the adjusting elements evidence a lower height or diameter relative to the width of the slot in the clamped-in condition of the connector, and wherein guide surfaces are formed on the connector for the preadjustment and final adjustment of the adjusting elements.