is shown engaged with the ignition switch 12 in this figure the lock housing 14 is omitted in the interest of clarity in order to engage with the driving end 28 of the lock driver 16 the ignition switch 12 is provided with a collar 38 that extends from a wall 40 of the switch case 34 that faces in the direction of the lock driver 16 as such the collar 38 extends axially in the direction of the lock driver 16 as mentioned previously during installation the ignition switch 12 is inserted in a direction that is perpendicular to the longitudinal axis of the lock driver 16 to permit the driving end 28 to be received into the collar 38 a side opening 42 that is open in the direction of insertion 30 is defined in the collar 38 the side opening 42 extends circumferentially around or about the collar 38 less than 180 u00b0 and more preferably less than 90 u00b0 of the circumferential extent of the collar 38 accordingly during installation the rib 36 positions the ignition switch 12 such that the driving end 28 of the lock driver 16 passes through the side opening 42 and into collar 38 until fully seated therein which occurs simultaneously with full insertion of the ignition switch 12 in the ignition switch housing 22 to further facilitate engagement of the driving end 28 within the collar 38 the driving end 28 is formed with a pair of opposed flat lands or.