Downloading TM Sweden AB's fiscal report for 2022 (årsredovisning), under "Not 7" there is costs for staff and average number of staff for 2021 and 2022:
2022: 289 full-time equivalent employees, 133MSEK salaries.
2021: 220 full-time equivalent employees, 101MSEK salaries.
Both seem to come out to an average of around 38 KSEK/month (~€3250). I'd suspect the mechanics to have the lowest salary in the organization, so probably somewhat lower than that. But that's pure speculation on my behalf.
It could be a matter of coincidence due to hiring of more staff in more junior positions or so, but the lack of salary increases from year to year could be more interesting to the union (the unions typically have a percentage "mark" salary bump in the collective agreement that you're guaranteed every year). That is also speculative.
