A failsafe (10,110,210,310) for a transdermal apparatus for a prosthetic appendage, the failsafe comprising: a first plate having a central axis, the first plate comprising: a proximal portion; and a distal end securable with a prosthesis configured to be disposed external to skin, the prosthesis configured to simulate an appendage of a patient; a second plate alignable with the central axis, the second plate comprising: a proximal end securable to a transdermal implant, the proximal end extending proximally from the second plate; and a distal portion configured to interface with the proximal portion of the first plate; and a breakaway connector coupleable within the second plate and the first plate and configured to allow the second plate to break away from the first plate when a moment applied to both the first and the second plate is larger than a threshold moment, wherein the breakaway connector is configured to cause engagement of the distal portion of the second plate with the proximal portion of the first plate and wherein the breakaway connector further comprises: a base; and a plurality of arms (76a, 76b, 76c, 76d, 76e, 76f) projecting axially from the base and extending between the second plate and the first plate, fit characterised in that the plurality of arms each comprise a prong (78a, 78b, 78c, 78d, 78e, 78f) disposed at a termination of each arm, each prong extending radially outward from each arm to create a radial extension that is configured to engage a radial surface of a counterbore of one of the first plate and the second plate to engage the first plate and the second plate. a first plate having a central axis, the first plate comprising: a proximal portion; and a distal end securable with a prosthesis configured to be disposed external to skin, the prosthesis configured to simulate an appendage of a patient; a proximal portion; and a distal end securable with a prosthesis configured to be disposed external to skin, the prosthesis configured to simulate an appendage of a patient; a second plate alignable with the central axis, the second plate comprising: a proximal end securable to a transdermal implant, the proximal end extending proximally from the second plate; and a distal portion configured to interface with the proximal portion of the first plate; and a proximal end securable to a transdermal implant, the proximal end extending proximally from the second plate; and a distal portion configured to interface with the proximal portion of the first plate; and a breakaway connector coupleable within the second plate and the first plate and configured to allow the second plate to break away from the first plate when a moment applied to both the first and the second plate is larger than a threshold moment, wherein the breakaway connector is configured to cause engagement of the distal portion of the second plate with the proximal portion of the first plate and wherein the breakaway connector further comprises: a base; and a plurality of arms (76a, 76b, 76c, 76d, 76e, 76f) projecting axially from the base and extending between the second plate and the first plate, fit characterised in that the plurality of arms each comprise a prong (78a, 78b, 78c, 78d, 78e, 78f) disposed at a termination of each arm, each prong extending radially outward from each arm to create a radial extension that is configured to engage a radial surface of a counterbore of one of the first plate and the second plate to engage the first plate and the second plate. a base; and a plurality of arms (76a, 76b, 76c, 76d, 76e, 76f) projecting axially from the base and extending between the second plate and the first plate, fit characterised in that the plurality of arms each comprise a prong (78a, 78b, 78c, 78d, 78e, 78f) disposed at a termination of each arm, each prong extending radially outward from each arm to create a radial extension that is configured to engage a radial surface of a counterbore of one of the first plate and the second plate to engage the first plate and the second plate.