You might read this old thread on the alternate air subject:
https://hoster3.commander.org/vb/forum/members-only-forums/112tc-and-to360/3920-alternate-air-cable-repair#post80915
https://hoster3.commander.org/vb/forum/members-only-forums/112tc-and-to360/3920-alternate-air-cable-repair#post80915