Wolverine MTW Grip plate with on/off and grip line

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Bottomplate for original grip on the MTW With hole and on/off-switch

What you need is a O-Ring.
13X2.5mm fits like a glove.
 

You also need a switch, I use this one (E1114):
https://www.amazon.se/-/en/dp/B0BTM3WQXN?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1 
https://www.amazon.de/dp/B0BTM3WQXN/?th=1 

And of course also some jst-connectors

There is a version without hole for the hose, if you use FRAC or some other solution.