My guess is that it is a momentary switch that makes a contact to tell the computer to switch modes. Pop it out to confirm. Then just buy a similar button and install it somewhere more appropriate, lengthen wires, and enjoy.
91 YJ Sahara, 4.0L, AX-15/NP231, D30/D35@3.07
12 Cherokee 4x4,3.7L,42RLE/MP1522, D30Memail@example.com
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