2001 wiper linkage setting

[meloui64]

A bolt on our wiper linkage came loose resulting in wiper failure. Have tightened the bolt but wipers now out of correct setting. Is there any way to know where the linkage should be when the wipers are in the park position or is it trial and error?

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[Altransit]

I believe that it's trial and error, only because I had the same problem, and they've never parked correctly since then, even though I tried dismantling and refitting a couple of times

[ned]

I had mine parking perfect untill I had a screen fitted, now the drives one points down a bit and it psses me off, nothing I do makes it any better N