I’m looking to add a Honeywell 4219 (picture) to my alarm system, and I’m trying to figure out how to mount it in my Honeywell Distribution box (model unknown, but picture of similar box is here). The 4219 mounts with screws (with or without the case), and the distribution box does not have screw holes to mount anything. The box has rungs for sliding a thin piece of metal.

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Setting it down at the bottom of the distribution box isn’t really an option because some of the sensor cables are not long enough to reach (I’m creating more zones for increased granularity). Is there somewhere I can buy hardware that I can mount the 4219 on, and then mount to the box (similar to the MDC8T8RJ pictured with distribution box)?

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Alternatively (and less than ideal), I could maybe move the backup battery down to the bottom of the distribution box, and rest the 4219 where the battery previously sat. However, I’m unable to locate an extension for the auxiliary battery cable to make it long enough to reach. Does anyone know where I could find an extension for F1 connectors (my Googling only comes up with F1 to F2 converters)?

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Even less idea, I could splice wires to the sensor cables to extend them, allowing me to place the 4219 at the bottom, but I really don’t want to introduce that level of potential issues.

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Any thoughts would be great, and thanks in advance!