Hello, I am repairing the rear brakes in a 1989 F250 I rwce tly bought there was co siderae damave to the internal parts due to the laat brame job was installed incorrectly. Springs were broken or missing and the parking brake cables were broken, most likely due to improler routing and connection. .y question is can someone ease explain the pupose of the two small horsesboe shaped parts that are include in the new drum hardware kit
they were not in the brakes when I removed tbe drums and I have no clue what they are for. Again 1989 F250 3/4 ton full float rear. Your assistance will be grwatly appreciated Please see highlighted parts

 

Welcome to the site..

The horse shoe clips held the e brake arm/pin in place to the brake shoe.. There’s a round slotted pin that goes through the brake shoe and extends through the e brake arm. Generally there will be an anti rattle spring washer as well. The pin pushed or were a light press fit through the back side of the shoe flange, then the e brake arm installed, and then pliers were used to squeeze the clip ends towards each other,, basically like a snap ring in a groove..
The shoe and arm were generally assembled off the vehicle, then the brake cable attached to the arm prior to the shoe being pin retainer attached to the backing plate...
Some of the heavier series, the e brake arm had a center pivot bolt and spring that bolted trough the top/center of the backing plate..
I don’t remember offset shoe retaining pins, and generally the brake shoe hold down springs were two different lengths. Been a while though.....

 

I believe Hayapower covered it pretty thoroughly.
Many times a parts manufacturer will use one parts kit to cover a few models which could use specific parts that may not apply to your particular vehicle. If you are not familiar with this system it could leave you pulling your hair out wondering where the extra parts go.
From looking at the parts you show, I have some reservations as to what they are supposed to fit. Some manufacturers have kits for specific vehicles and others put out a general kit that they feel should cover most vehicles.

 

Parking brake.....