Sylheti word order

I've been working on Sylheti - a highly divergent dialect of Bengali / language very closely related to Bengali spoken around Sylhet in northeastern Bangladesh - for my field methods class for a while. The particular point I'm focusing on at the moment is the positioning of complement clauses, which obeys a simple rule: if the complement clause has a separate subject, it follows the verb; otherwise, it precedes the verb. The language is otherwise SOV, I should note, so you get contrasts like:

ami exṭa apol sai.
I an apple want-1.
“I want an apple.”

ami exṭa apol xaitam sai.
I [an apple eat-COND-1] want-1.
“I want to eat an apple.”

ami sai he exṭa apol xaok.
I want-1 [he an apple eat-3-OPT].
“I want him to eat an apple.”

This doesn't fit my Japanese-based expectations of "proper" SOV languages (in Japanese, the subordinate clause would always precede the verb) but it turns out that German has basically the same word order (if you factor out the main-clause V2 order by having an initial complementizer). There are some obvious processing motivations for such an order, but it doesn't really fit the head-position parameter idea so well. I was wondering: has anyone seen similar patterns in other SOV languages?