class clstest(models.Model):
    _name = "cla"
    #This is main form 
    rps = fields.Many2many('clb', 'rp_rel', 'cla_id', 'clb_id', u'List')

@api.multi
def btn1(self):
    return {
        'type': 'ir.actions.act_window',
        'res_model': 'clb',
        'view_type': 'form',
        'view_mode': 'form',
        'context': self.env.context,
        'target': 'new',
    }

class classt1(models.Model):
    _name = "clb"
    #This is Wizard Form    
    name = fields.Char(string=u"Code")

@api.model
def create(self, vals):

    res = super(classt1, self).create(vals)
    rid = [res.id]#send rid to rps
    return res

<header>
    <button name="btn1" string="BTN Test" type="object" class="oe_highlight"/>

</header>

How to send "id created" wizard to "rps" main form?

Thanks.