The invention relates to a insulating body that can be inserted into a housing (11) of a plug connector (10) and that is formed from a connection part (2) and a contacting part (3), wherein contacting means (4) are arranged in the contacting part (3) and the connection part (2) is provided with recesses (5), into which individual conductors of a multi-core cable can be clamped. The connection part (2) and the contacting part (3) can be plugged together, as a result of which the individual conductors in the multi-core cable can be electrically contacted with the individual contacting means (4). According to the invention, the connection part (2) has means that align the individual conductors along the recesses (5) in the connection part (2) such that each of the conductors is pressed into the respective recesses and the direction of the conductor changes along the recesses.
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