Which OFH do you have?

The end of the line is a female end, the it has a male on each end 90* fitting, and the end supplied is bigger than the hole that is recommended in the mighty max housing thread. Do I just need to get an adapter to connect the line to that spot? What do I do with the sender that is currently in that spot? Here is the feed line and the housing currently. I also have a brand new unmolested ff housing.

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Either an adapter is needed or the housing needs drilled and tapped for the thread on the feed line.

With an adapter, a T can be had instead of a straight through fitting which would allow for both sensors to be retained and use a feed line. As I wrote in the Mighty Max housing thread, FFWDConnection has pictures of everything set up as it would need to be to keep all sensors and feed from the FFOFH.

If the housing is drilled and tapped for the feed line, only one sensor could be used because there are no more places for a sensor