> For the complete documentation index, see [llms.txt](https://nxp.gitbook.io/mr-b3rb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nxp.gitbook.io/mr-b3rb/hardware/mr-b3rb-mechanical-assembly-guide.md). # MR-B3RB Mechanical Assembly Guide ## Upper Chassis assembly The following pages describe the mechanical assembly of the MR-B3RB-M. ## Pre-assembled Lower Chassis Note that the lower chassis of the latest version of MR-B3RB-M should be partially assembled as follows: * Front and rear "bumper" plastic * PDB (power distribution board) installed * LED lighting installed and wired to PDB * QDEC (Quadrature Decoder) cable to motor installed * Motor cable connected to PDB * XT60 battery wire and power switch attached to PDB These instructions are now updated for the production version of the MR-B3RB. If you have a pre-production version, please see [the archive area here](broken://pages/dMyOlKVbPHomyUMDHUWV) or the previous version of the document.