I am presuming this is a string of bells, not a set that fastened to the harness? There are SO MANY kinds of bells, locations to put them on sleigh, horse or other vehicles, that much guessing will dig me into a hole!!
The leather strings of bells can usually be re-leathered by a local harness maker. Bells usually are round and have a tab with a hole, cast on them. Tab is poked thru one leather strap, then a locking device (tiny hairpin clip, cotter pin) goes thru the hole in tab to keep bell on the strap. Strap is usually doubled, covers bell tab ends, so horse isn’t poked with the bell or locking device when wearing the bells.
Strings of bells come in different lengths, so they might only fit around a neck. Other long strings go around the girth area, with a cord attaching leather strap to harness saddle so it can’t slip back into the flank area. Leather strap ALWAYS goes OVER the shafts, so horse can’t crush the bells against the shaft. There are bells that go across the hips, short string of 4 or 6 bells, usually a larger, 1 1/2 or 2 inch bells.
It is really easy to go crazy putting bells on a sleigh horse, and not all horses can make the bells sound “nice” in travel. You have to try your gaits, vary the speed, to find the nicest sound with horse going along. TOO MANY bells just makes a jangle of noise, which is EXTREMELY annoying during travel. We had our “whole collection” on the horse and it was just noise. Stopped horse with her pinned ears, took off several belled items. which made the rest of the drive MUCH more pleasant and horse a LOT happier!
We heard from various neighbors we met around town, how they enjoyed hearing the bells when we got out and drove. Some were at least 2 miles away, but the sound carries well on the rolling ground with snow cover.
Do take TIME to get LED horse used to bells BEFORE strapping them on him. Some horses take a LONG time to be happy in bells, and that is just doing ground work!! Not all driving horses even KNOW about bells, so BE CAREFUL using them until you know how your horse will respond!!