# Step 1: Set Up Actuator ID 3

> Connect the XT30 (2+2) cable connectors to actuator ID 3, route the 280 mm cable through the actuator shaft, and leave the 150 mm cable and its free connector accessible.

- Page: https://docs.menlo.ai/asimov/1/build/assembly-steps/left-leg-module/thigh-assembly/step-1
- Section: Asimov › Asimov 1 › Assemble Asimov 1 › Assemble › Left Leg Module › Thigh Assembly
- Previous: [Assembly Conventions](https://docs.menlo.ai/asimov/1/build/assembly-steps.md)
- Next: [Step 2: Install Actuator ID 3](https://docs.menlo.ai/asimov/1/build/assembly-steps/left-leg-module/thigh-assembly/step-2.md)

> [!IMPORTANT]
> **Assign actuator IDs before assembly**
>
> Assign and verify all 25 actuator IDs before assembling the robot. The robot will not work correctly with missing or incorrect IDs. IDs must be assigned one actuator at a time on the bench; you may need to disassemble the robot if you skip this step. See [Assign Actuator IDs](https://docs.menlo.ai/asimov/1/build/assembly-preparations/assign-actuator-ids.md).

## Parts needed

| Part | Count |
| - | -: |
| EC-A3814-H14-107 actuator (part `600_02X`) (ID 3) | 1 |
| 280 mm single-ended XT30 (2+2) cable | 1 |
| 150 mm double-ended XT30 (2+2) cable | 1 |

## Instructions

1. Place the EC-A3814-H14-107 actuator (ID 3) on a flat surface with the shaft facing downward toward the floor.

2. Connect the connector of the 280 mm single-ended XT30 (2+2) cable to the actuator port nearest the center hole, then route the cable through the hollow shaft.

3. Connect one connector of the 150 mm double-ended XT30 (2+2) cable to the outer actuator port, leaving the cable and its free connector accessible.