How can i rewrite this into a class method?

I need to incorporate the following code in a class I’m working on, so it need it to be like this.translate()... Instead of the current syntax. How would i do that?

Current syntax:

  export default class Tail {
    constructor() {
      //array of images
      this.tail = [...this.el.querySelectorAll('img')]
      //length
      this.tailCount = this.tail.length
    }
  

    this.translate() {
      //to be here.
    }
  }

  let translate = [...new Array(this.tailCount)].map(() => ({
    // i wish this funtionality incorporated into my `this.translate()`
    previous: {
      x: 0,
      y: 0
    },
    current: {
      x: 0,
      y: 0
    },
    amt: position => 0.10 + 0.05 * position
  }))