Triangle plates

This photo was lifted from West Marine.
These are an easy way to connect bridals to a Harken drum.
The listed kit shows plate(S), as in plural.The idea is you assemble the two plates with the pins,the gap between the plates allows for shackles and/or thimbles to attach via the pins.
If your bridal wires end in forks,you do not need them both, you only need a single plate for your Cat setup, placed between the drum jaw & bridal jaws, secured with pins.