I have an acoustic bass bridge that appears to be all wood, but it actually has a brass block inside that has slots to allow the ball end of the string to slide into the slot without the ball end escaping. The brass block takes the tension. That bridge attaches to the bass body / interior bridge plate with screws.
It looks similar to one of the pictures
@funkinbottom posted, but it’s not as long longitudinally (shorter slots)
View attachment 5033568
Something that might change your plans, no metal south of the nut. Some, if not all, magnetic pickups require the strings are grounded, and electric basses almost universally ground the strings at the ball end by grounding a metal bridge.
String grounding might be more for noise prevention and might not be required to generate a current in the pickups.