LaHumanRigに対してこのようなスクリプトをつけて、エフェクタを操作できます。

YBRigControl.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using LaHuman;

public class YBRigControl : MonoBehaviour
{
    LaHumanRig _rig;
    BodyTransformsData _body = new BodyTransformsData();
    Dictionary<string, GameObject> _dicObj = new Dictionary<string, GameObject>();
    // Start is called before the first frame update
    void Start()
    {
        _rig = GetComponent<LaHumanRig>();
        _rig.BodyTransforms.CopyTo(_body);

        _dicObj["Hips"] = createEffector(_body.HipsEffector);
        _dicObj["LeftHand"] = createEffector(_body.LeftHandEffector);
        _dicObj["RightHand"] = createEffector(_body.RightHandEffector);
        _dicObj["LeftFoot"] = createEffector(_body.LeftFootEffector);
        _dicObj["RightFoot"] = createEffector(_body.RightFootEffector);
    }

    GameObject createEffector(Vector3 pos)
    {
        GameObject o = GameObject.CreatePrimitive(PrimitiveType.Sphere);
        o.transform.localScale = Vector3.one * 0.1f;
        o.transform.position = pos;
        o.transform.SetParent(BrickCreator.Inst.transform);
        var r = o.AddComponent<Rigidbody>();
        r.isKinematic = true;
        return o;
    }

    // Update is called once per frame
    void Update()
    {
        _body.HipsEffector = _dicObj["Hips"].transform.position;
        _body.LeftHandEffector = _dicObj["LeftHand"].transform.position;
        _body.RightHandEffector = _dicObj["RightHand"].transform.position;
        _body.LeftFootEffector = _dicObj["LeftFoot"].transform.position;
        _body.RightFootEffector = _dicObj["RightFoot"].transform.position;
        _rig.BodyTransforms.ApplyPreset(_body);
    }
}