Greg I sse you have your satnav on a suction mount on the screen. See Chris's dash on the post after your 1st post. He has a Ram ball mount lower left of speedo, a much neater & rigid solution & its hidden under tonneau when parked. He also has a clock mounted in front of the wheel as I have. I dont have my car nearby to check the thread size. You also need a appropriate double socket arm to suit.
https://www.ram-mount.co.uk/components/ball-size-a-b-c-d-e-2/It's a RAM 1” tough-ball, M6-1 fitting. RAM-RAP-B-379U-M616 which for the standard dash fits into one of the M6 dash panel mounting holes. You'll need to check if there's a suitable bolthole you can use for the Heritage dash.
For info, it's listed in the Alternative Parts List which is available from the MTWC website at
https://www.mtwc.co.uk/wp-content/uploads/2021/02/Updated-list-5-Feb-2021-PDF.pdfThe clock is simply stuck on with velcro:
https://time4bikes.com/British-Made-VerSa-Darkside-Billet-Casing-with-Black-Clock