Step3
A.Attach the both end of the cross beam (8#)to the right rear vertical frame(2#) and left rear vertical frame (31#) as
the diagram shows. Secure one end with Secure them with 1 pc L shape bracket(9#),2pcs M12*75 Hex
bolt(73#),2pcs M12*95 Hex bolt(76#) ,8pcs
φ
12 washer (74#),4pcs M12 Aircraft nut (75#).
B.Assemble another end with the same way in A.