US Patent 7186135 Connector and assembling method therefor

An ECU connector (1) is connectable with a tower connector (2). The two connectors are completely connected by tightening a bolt (4) after being fit to a specified depth and centered with respect to each other. At the specified depth, a detection arm (32) on the ECU connector (1) resiliently engages a receiving portion (12) on the tower connector (2) and a surface facing the detection arm (32) can be hit by the detection arm (32). Accordingly, by starting bolt tightening after the specified depth is reached, problems such as deformations of the leading ends of tower male terminals (13) and damage to the two connectors (1, 2) can be avoided.