Yep, understood! Did you see the talkbass thread? There is a comment here: https://www.talkbass.com/threads/installing-a-jaguar-mute-on-a-p-bass.1021488/post-25017334
| the plunger requires a 1/2 inch diameter hole, and 36 mm, or about 1 13/32 inches. This is critical, as the Tele Bass body is 1 1/2 inches thick, so one slip and you drill through the body.
Seems like they say the pitch goes slightly sharp when you engage?