I basically melt those holes on its legs and the put some clear plastic underneath and color them green for the lower part and yellow for the upper, i used a sharpie marker. i also paint those circle parts of the knee gold. i got those clear plastic from my 00 gundam kit.
these are the step by step of how i install the tubes. i basically made holes for the tubes to go through(those "tubes" are from my old earphones) and used a glue gun to put them in place. those tubes do hinder the articulation of deathscythes legs but not as much. i like how the legs turn out to be because even though it lacks articulation now, deathscythe can stand solid with all his equipment now.