part to join with a 2GPU Riser card model

E.jscad

"use strict"
const jscad = require('@jscad/modeling')
const { translate, rotateZ } = jscad.transforms
const { cuboid, sphere } = jscad.primitives

function main() {
  return rotateZ(Math.PI/2,[
    cuboid({size: [70,10,10]}),
    translate([0,50,0], cuboid({size: [70,10,10]})),
    translate([0,100,0], cuboid({size: [70,10,10]})),
    translate([30,50,0], cuboid({size: [10,110,10]})),
  ])
}

module.exports = { main }

With this model ...
https://www.printables.com/model/1276633-v013pro-pci-e-extender-remix-for-inter-tech-and-ge

... above "E" model looks like this: