An aiming guide system configured for connection to a bone plate (100, 200, 300, 400, 600, 700) the bone plate extending along a longitudinal axis and comprising a proximal portion (102, 202), a shaft (110, 210, 510), and a distal portion (104, 204, 504), the bone plate defining a plurality of first screw holes (130, 132, 230, 232, 330, 332, 430, 432, 530) along the shaft, a plurality of second screw holes (140, 240, 340, 440, 540) at the distal portion, and an attachment screw hole (602, 702) proximate the distal portion, the aiming guide system comprising: an aiming arm having a rigid body extending from a proximal end to a distal end with a plurality of aiming holes defined through the rigid body between the proximal end and the distal end thereof, the distal end defining an attachment slot through the rigid body, and a connection assembly configured to engage the attachment screw hole (602, 702) and the attachment slot such that the aiming arm is fixed in position relative to the bone plate (100, 200, 300, 400, 600, 700) with each of the plurality of aiming holes aligned with a respective one of the first screw holes (602, 702), wherein the connection assembly includes an attachment post having a first end with an orienting boss extending from a mating surface, wherein the orienting boss is configured to be received in the attachment slot such that the aiming arm rests on the mating surface and is maintained in a proper orientation, wherein the attachment post includes an attachment block at a second end, the attachment block having a distal surface, characterized in that the distal surface of the attachment block defines a plurality of ball end pins, each ball end pin configured to be received in a respective indentation (144, 244, 344, 444) on the plate surface about the attachment screw hole (602, 702), wherein positioning of the ball end pins within the indentations (144, 244, 344, 444) properly aligns the attachment post relative to the plate. an aiming arm having a rigid body extending from a proximal end to a distal end with a plurality of aiming holes defined through the rigid body between the proximal end and the distal end thereof, the distal end defining an attachment slot through the rigid body, and a connection assembly configured to engage the attachment screw hole (602, 702) and the attachment slot such that the aiming arm is fixed in position relative to the bone plate (100, 200, 300, 400, 600, 700) with each of the plurality of aiming holes aligned with a respective one of the first screw holes (602, 702), wherein the connection assembly includes an attachment post having a first end with an orienting boss extending from a mating surface, wherein the orienting boss is configured to be received in the attachment slot such that the aiming arm rests on the mating surface and is maintained in a proper orientation, wherein the attachment post includes an attachment block at a second end, the attachment block having a distal surface, characterized in that the distal surface of the attachment block defines a plurality of ball end pins, each ball end pin configured to be received in a respective indentation (144, 244, 344, 444) on the plate surface about the attachment screw hole (602, 702), wherein positioning of the ball end pins within the indentations (144, 244, 344, 444) properly aligns the attachment post relative to the plate.